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Use the A-Z list to browse more than 6,000 health-related topics in our library. Clicking on a term opens the definition and, in most cases, links to more information.
Topic Index
- + OPC
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- OPC
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"OPC" is more commonly referred to as "Thrush" in the medical community.
Thrush
Also Known As: "Thrush Mouth, Tongue Candidiasis, Oral Candidiasis, Oral Thrush, Tinea Nigra, Mouth Candidiasis, Oropharyngeal Candidiasis"
A yeast infection of the mouth characterized by whitish patches on the corners of the mouth, insides of the cheeks, tongue, palate and throat. It is caused by overgrowth of Candida fungus and is common in babies.
More Information on Thrush: Oral Infections
- + OPCA
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- OPCA
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"OPCA" is more commonly referred to as "Olivopontocerebellar Atrophy" in the medical community.
Olivopontocerebellar Atrophy
A form of multiple system atrophy (MSA) that primarily involves difficulties with balance, coordination and speech.
More Information on Olivopontocerebellar Atrophy: Brain & Nerve Basics
- + OPCAB
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- OPCAB
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"OPCAB" is more commonly referred to as "Off Pump Bypass Surgery" in the medical community.
Off Pump Bypass Surgery
Also Known As: "Off Pump Coronary Artery Bypass"
Off-Pump Coronary Artery Bypass (OPCAB) surgery is performed without stopping the patient's heart or using the heart-lung machine. Instead, heart stabilizers keep the heart motionless where the surgeon is working on a particular coronary artery.
More Information on Off Pump Bypass Surgery: Bypass Surgery
- + OPCRES
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- OPCRES
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Also Known As: "Off Pump Coronary Revascularization with Endoscopic Saphenous Vein, Off Pump Vein Harvesting"
A minimally invasive, less expensive strategy for performing coronary bypass surgery. It combines endoscopic vein harvesting (to remove a patient's blood vessel for use as a bypass graft), and OPCAB, or "beating heart" bypass surgery.
More Information on OPCRES: Bypass Surgery
- + Open Cholecystectomy
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- Open Cholecystectomy
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"Open Cholecystectomy" is more commonly referred to as "Gallbladder Surgery" in the medical community.
Gallbladder Surgery
Also Known As: "Laparoscopic Gallbladder Surgery, Cholecystectomy, Laparoscopic Cholecystectomy"
The surgical removal of the gallbladder. It may be performed in an open procedure or through small holes in the abdomen with the assistance of a laparoscope.
More Information on Gallbladder Surgery: Liver, Pancreas & Biliary
- + Open Colectomy
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- Open Colectomy
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"Open Colectomy" is more commonly referred to as "Colectomy" in the medical community.
Colectomy
Also Known As: "Left Hemicolectomy, Bowel Resection, Right Hemicolectomy, Partial Colectomy, Laparoscopic Colectomy, Sigmoid Colectomy, Hemicolectomy"
Surgical removal of all or part of the colon (large intestine). Partial colectomy may also be called hemicolectomy. It may be performed in a open procedure (one large incision) or through laparoscopy (uses a camera and several smaller incisions).
More Information on Colectomy: Digestive Treatments
- + Open Comedo
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- Open Comedo
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"Open Comedo" is more commonly referred to as "Blackhead" in the medical community.
Blackhead
Also Known As: "Open Comedones"
Pinhead-sized dark spots caused by a small plug in the opening of a follicle (pore) caused by oils and impurities. They are common in acne. Unlike with whiteheads, the pore stays open in a blackhead.
More Information on Blackhead: Acne & Blemish
- + Open Comedones
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- Open Comedones
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"Open Comedones" is more commonly referred to as "Blackhead" in the medical community.
Blackhead
Also Known As: "Open Comedo"
Pinhead-sized dark spots caused by a small plug in the opening of a follicle (pore) caused by oils and impurities. They are common in acne. Unlike with whiteheads, the pore stays open in a blackhead.
More Information on Blackhead: Acne & Blemish
- + Open CT
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- Open CT
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"Open CT" is more commonly referred to as "CAT Scan" in the medical community.
CAT Scan
Also Known As: "CT Scan, Chest Computed Tomography, Computed Axial Tomography, Sinus Computed Tomography, Computed Tomography, Closed CT, Spiral CAT Scan"
Computed axial tomography (CAT Scan or CT Scan) allows for multiple x-rays to be taken from different angles around the patient.
More Information on CAT Scan: Imaging Tests
- + Open Fractures
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- Open Fractures
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"Open Fractures" is more commonly referred to as "Fractures" in the medical community.
Fractures
Also Known As: "Simple Fractures, Oblique Fractures, Closed Fractures, Compound Fractures, Stress Fractures, Impacted Fractures, Converse Fractures"
A break, rupture or crack - especially in bone or cartilage - that is often painful. Most often caused by trauma, fractures may remain under the skin (closed) or break through (open). Types include: simple, compound, impacted, oblique, stress and converse.
More Information on Fractures: Infection & Trauma Pain
- + Open Head Injury
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- Open Head Injury
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A head injury in which a foreign object breaks through the skull and punctures soft tissues and blood vessels of the brain.
More Information on Open Head Injury: Head & Spine Injury
- + Open Heart Surgery
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- Open Heart Surgery
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Also Known As: "Cardiac Surgery"
An operation in which the chest is opened and the surgeon makes permanent changes in the heart, the major blood vessels or other heart-related structures. It requires the use of a heart-lung machine to circulate blood and oxygen during surgery.
More Information on Open Heart Surgery: Heart Basics
- + Open Hysterectomy
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- Open Hysterectomy
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"Open Hysterectomy" is more commonly referred to as "Hysterectomy" in the medical community.
Hysterectomy
Also Known As: "Abdominal Hysterectomy, Vaginal Hysterectomy, Laparoscopic Hysterectomy"
Surgical removal of the uterus that may be performed through the abdomen, vagina or by laparoscopy. It is used in the treatment of cancers or uterine disorders. It may be performed alone of in combination with a oophorectomy (removal of the ovaries).
More Information on Hysterectomy: Uterine & Ovarian Health
- + Open Lymphadenectomy
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- Open Lymphadenectomy
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"Open Lymphadenectomy" is more commonly referred to as "Lymphadenectomy" in the medical community.
Lymphadenectomy
Also Known As: "Lymph Node Excision, Lymph Node Removal, Lymph Node Dissection, Laparoscopic Lymphadenectomy"
Surgical removal of one or more lymph nodes in order to examine the nodes for signs of cancer. It may be performed through tradition surgery (open) or using a technique to minimize incision size (laparoscopy).
More Information on Lymphadenectomy: Cancer Basics
- + Open Prostatectomy
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- Open Prostatectomy
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"Open Prostatectomy" is more commonly referred to as "Prostatectomy" in the medical community.
Prostatectomy
Also Known As: "Laparoscopic Prostatectomy, Simple Prostatectomy, Retropubic Prostatectomy, Radical Prostatectomy, Transurethral Prostatectomy, Perineal Prostatectomy, Partial Prostatectomy"
Surgical removal of all or part of the prostate gland and, in some cases, the surrounding lymph nodes. It may be performed in an open procedure, by laparoscopy or through the urethra (transurethral).
More Information on Prostatectomy: Prostate & Testicular
- + Open Spine
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- Open Spine
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"Open Spine" is more commonly referred to as "Spina Bifida" in the medical community.
Spina Bifida
Also Known As: "Spina Bifida Occulta, Meningocele, Myelomeningocele"
A birth defect in which the backbone and spinal canal do not close before birth. In some cases, the spinal cord and its covering membranes may protrude out of an affected infant's back, a condition requiring surgery.
More Information on Spina Bifida: Birth & Genetic Disorders
- + Operation
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- Operation
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"Operation" is more commonly referred to as "Surgery" in the medical community.
Surgery
A procedure that is usually done in an operating room in a hospital by a surgeon. In most cases, patients are "put to sleep" by general anesthesia before the surgery is performed.
More Information on Surgery: Healthcare Basics
- + Ophthalmalgia
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- Ophthalmalgia
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"Ophthalmalgia" is more commonly referred to as "Eye Pain" in the medical community.
Eye Pain
Also Known As: "Eyeache, Eye Pressure, Ocular Pain, Eye Discomfort"
Pain that is located in or around the eye. It may involve visual disturbances. It may be due to many different conditions including multiple sclerosis, migraine, cluster headache, glaucoma and shingles.
More Information on Eye Pain: Ear, Eye & Face Pain
- + Ophthalmologist
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- Ophthalmologist
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Also Known As: "Eye Doctor"
Physicians who specialize in the diagnosis, treatment and prevention of eye diseases and disorders, including diabetic retinopathy, cataracts, glaucoma and more. They can also write prescriptions for glasses and contact lenses.
More Information on Ophthalmologist: Eye Conditions
- + Opioid Agonists
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- Opioid Agonists
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Also Known As: "Opioid Analgesics, Opioid Antagonists, Opium Agents"
Narcotic medications that contain substances which act on the brain to decrease the sensation of pain. They require a prescription from a physician.
More Information on Opioid Agonists: Pain Medications
- + Opioid Analgesics
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- Opioid Analgesics
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Also Known As: "Opioid Antagonists, Opium Agents, Opioid Agonists"
Narcotic medications that contain substances which act on the brain to decrease the sensation of pain. They require a prescription from a physician.
More Information on Opioid Analgesics: Pain Medications
- + Opioid Antagonists
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- Opioid Antagonists
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Also Known As: "Opium Agents, Opioid Agonists, Opioid Analgesics"
Narcotic medications that contain substances which act on the brain to decrease the sensation of pain. They require a prescription from a physician.
More Information on Opioid Antagonists: Pain Medications
- + Opioids
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- Opioids
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Also Known As: "Opioid Agonists, Opioid Analgesics, Opioid Antagonists, Opium Agents"
Narcotic medications that contain substances which act on the brain to decrease the sensation of pain. They require a prescription from a physician.
More Information on Opioids: Pain Medications
- + Opisthorchiasis
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- Opisthorchiasis
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Infection of the biliary tract with trematodes of the genus Opisthorchis. Transmission occurs through ingesting raw or inadequately cooked fish infected with the parasites.
More Information on Opisthorchiasis: Parasitic Disease
- + Opisthorchis Infection
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- Opisthorchis Infection
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Also Known As: "Opisthorchiasis"
Infection of the biliary tract with trematodes of the genus Opisthorchis. Transmission occurs through ingesting raw or inadequately cooked fish infected with the parasites.
More Information on Opisthorchis Infection: Parasitic Disease
- + Opitz Frias Syndrome
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- Opitz Frias Syndrome
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Also Known As: "Hypertelorism Hypospadias Syndrome, X Linked Opitz Syndrome, Oculo Genito Laryngeal Syndrome, XLOS, Hypospadias Dysphagia Syndrome, Telecanthus Hypospadias Syndrome"
A type of multiple congenital anomaly/mental retardation (MCA/MR) syndrome that may include one or more heart conditions, such as septal defects, heart murmurs, patent ductus arteriosus, tetralogy of Fallot, coarctation of the aorta and others.
More Information on Opitz Frias Syndrome: Pediatric Heart
- + Opium Agents
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- Opium Agents
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Also Known As: "Opioid Agonists, Opioid Analgesics, Opioid Antagonists"
Narcotic medications that contain substances which act on the brain to decrease the sensation of pain. They require a prescription from a physician.
More Information on Opium Agents: Pain Medications
- + OPO
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- OPO
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Independent and hospital-based organizations that coordinate the organ donation and recovery process upon the death of a potential donor. OPOs screen for donor suitability and work with families and medical providers during organ recovery.
- + Oppositional Defiance Disorder
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- Oppositional Defiance Disorder
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A disorder in which a child shows a pattern of uncooperative, defiant and hostile behavior toward authority figures such as parents and teachers. The cause is unknown in most cases.
More Information on Oppositional Defiance Disorder: Attention & Learning Disorders
- + Oppositional Defiant Disorder
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- Oppositional Defiant Disorder
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Also Known As: "Oppositional Defiance Disorder"
A disorder in which a child shows a pattern of uncooperative, defiant and hostile behavior toward authority figures such as parents and teachers. The cause is unknown in most cases.
More Information on Oppositional Defiant Disorder: Attention & Learning Disorders
- + Opsoclonus Myoclonus
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- Opsoclonus Myoclonus
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Also Known As: "Dancing Eyes Dancing Feet Syndrome, Kinsbourne Syndrome, Myoclonic Encephalopathy of Infants"
A neurological disorder marked by unsteady gait, myoclonus (brief muscle spasms) and opsoclonus (rapid eye movements). Other symptoms include difficulty speaking, It may occur in association with tumors or viral infections.
More Information on Opsoclonus Myoclonus: Movement Disorders
- + Optic Alexia
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- Optic Alexia
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"Optic Alexia" is more commonly referred to as "Alexia" in the medical community.
Alexia
Also Known As: "Motor Alexia, Musical Alexia"
A loss (or lessening) of the ability to comprehend written language or to read aloud. It is caused by a lesion in the central nervous system (brain and spinal cord). Types include motor, musical and optic.
More Information on Alexia: Neuro Signs & Symptoms
- + Optometrist
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- Optometrist
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A medical professional who can write prescriptions for glasses and contact lenses and may diagnose vision-related conditions. This is different than an ophthalmologist (a medical doctor specializing in eye-related diseases).
More Information on Optometrist: Eye Conditions
- + Oral
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- Oral
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Of or pertaining to the mouth.
More Information on Oral: Oral Health Basics
- + Oral & Dental Anatomy
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- Oral & Dental Anatomy
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Structures of the mouth include the teeth (including molars, premolars, canines and incisors), tonsils, uvula, tongue, gingiva (gums) and more.
More Information on Oral & Dental Anatomy: Oral Health Basics
- + Oral & Maxillofacial Radiologist
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- Oral & Maxillofacial Radiologist
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Dental specialist who interprets all types of x-ray images and data used to diagnose and manage diseases, disorders and conditions of the oral and maxillofacial region.
More Information on Oral & Maxillofacial Radiologist: Oral Health Basics
- + Oral & Maxillofacial Surgeon
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- Oral & Maxillofacial Surgeon
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Also Known As: "Oral Surgeon, Maxillofacial Surgeon"
Dental specialist who diagnoses and surgically treats problems related to the oral and maxillofacial regions. Examples include injuries from accidents, tumors in the jaw or mouth, and complicated dental procedures.
More Information on Oral & Maxillofacial Surgeon: Oral Health Basics
- + Oral Allergy Syndrome
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- Oral Allergy Syndrome
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Also Known As: "OAS"
An allergic reaction to food that involves itchiness, redness and/or swelling of the mouth, lips and/or throat. People with OAS often have other allergies or asthma. Raw fruits and vegetables and nuts are common triggers.
More Information on Oral Allergy Syndrome: Food Allergy & Intolerance
- + Oral Burns
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- Oral Burns
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Patients can burn their tongue or other parts of their oral cavity by consuming foods or drinks that are too hot. Placing aspirin or another painkiller against an aching tooth sometimes can result in burns to the gum.
More Information on Oral Burns: Oral Health Basics
- + Oral Cancers
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- Oral Cancers
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Also Known As: "Oral Cavity Cancers, Lip Cancers, Mouth Cancers"
Cancer of the mouth, lip and/or oropharynx (part of the throat at the back of the mouth). Most begin in the tongue and in the floor of the mouth. Tobacco, alcohol, sun exposure and a medical history of cancer are risk factors.
More Information on Oral Cancers: Head, Neck & Mouth Cancer
- + Oral Candidiasis
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- Oral Candidiasis
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"Oral Candidiasis" is more commonly referred to as "Thrush" in the medical community.
Thrush
Also Known As: "Thrush Mouth, Tongue Candidiasis, Oral Thrush, Tinea Nigra, Mouth Candidiasis, Oropharyngeal Candidiasis, OPC"
A yeast infection of the mouth characterized by whitish patches on the corners of the mouth, insides of the cheeks, tongue, palate and throat. It is caused by overgrowth of Candida fungus and is common in babies.
More Information on Thrush: Oral Infections
- + Oral Cavity Cancers
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- Oral Cavity Cancers
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Also Known As: "Lip Cancers, Mouth Cancers"
Cancer of the mouth, lip and/or oropharynx (part of the throat at the back of the mouth). Most begin in the tongue and in the floor of the mouth. Tobacco, alcohol, sun exposure and a medical history of cancer are risk factors.
More Information on Oral Cavity Cancers: Head, Neck & Mouth Cancer
- + Oral Cholecystogram
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- Oral Cholecystogram
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Also Known As: "Oral Cholecystography"
A series of x-rays of the gallbladder using a contrast medium. The contrast medium is swallowed in the form of several pills the night before the procedure.
More Information on Oral Cholecystogram: Digestive Imaging Tests
- + Oral Cholecystography
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- Oral Cholecystography
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A series of x-rays of the gallbladder using a contrast medium. The contrast medium is swallowed in the form of several pills the night before the procedure.
More Information on Oral Cholecystography: Digestive Imaging Tests
- + Oral Clefting
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- Oral Clefting
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"Oral Clefting" is more commonly referred to as "Cleft Lip & Palate" in the medical community.
Cleft Lip & Palate
Also Known As: "Clefting, Orofacial Clefting"
A birth defect characterized by a split in the lip and roof of the mouth. It can usually be corrected through surgery.
More Information on Cleft Lip & Palate: Birth & Genetic Disorders
- + Oral Complications of Cancer Therapy
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- Oral Complications of Cancer Therapy
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The oral cavity is highly vulnerable to complications resulting from cancer therapy. The most common complications include mucositis, infection, salivary gland dysfunction, taste dysfunction and pain.
More Information on Oral Complications of Cancer Therapy: Chemo & Radiation Therapy
- + Oral Contraceptives
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- Oral Contraceptives
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"Oral Contraceptives" is more commonly referred to as "Birth Control Pills" in the medical community.
Birth Control Pills
Medications that control a female patient's menstrual cycle. Although they are most commonly used to prevent pregnancy, they may also be prescribed for other conditions.
More Information on Birth Control Pills: Contraception
- + Oral Corticosteroids
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- Oral Corticosteroids
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"Oral Corticosteroids" is more commonly referred to as "Corticosteroids" in the medical community.
Corticosteroids
Also Known As: "Steroids, Glucocorticosteroids, Inhaled Corticosteroids, Corticosteroid Drugs"
Group of anti-inflammatory drugs similar to hormones produced by the body. Corticosteroids are used to treat many numerous conditions.
More Information on Corticosteroids: Allergy & Asthma Drugs
- + Oral Cyst
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- Oral Cyst
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Fluid-filled cavity under the skin or in the bone. It can be located in any part of the jawbones, inside the salivary glands, or within the gums, lips or tissues surrounding the oral cavity and face.
More Information on Oral Cyst: Mouth & Tongue Disorders
- + Oral Debridement
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- Oral Debridement
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Also Known As: "Full Mouth Debridement, Mouth Debridement"
The removal of heavy amounts of plaque and tartar from the teeth. It typically is performed on patients who have not visited the dentist in several years and may be the first part of comprehensive periodontal treatment.
More Information on Oral Debridement: Oral Health Basics
- + Oral Dissolution Therapy
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- Oral Dissolution Therapy
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The dissolving of cholesterol gallstones through the use of oral medications, preventing the need for surgery.
More Information on Oral Dissolution Therapy: Digestive Medications
- + Oral Evaluation
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- Oral Evaluation
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"Oral Evaluation" is more commonly referred to as "Dental Examination" in the medical community.
Dental Examination
Also Known As: "Dental Evaluation, Dental Exam, Oral Examination"
The process of examining the teeth, gums and other mouth structures for the presence of any disease or irregularities. Often, this will include a dental cleaning. In more thorough exams, the entire mouth, head and neck area will be examined.
More Information on Dental Examination: Oral Health Basics
- + Oral Examination
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- Oral Examination
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"Oral Examination" is more commonly referred to as "Dental Examination" in the medical community.
Dental Examination
Also Known As: "Dental Evaluation, Dental Exam, Oral Evaluation"
The process of examining the teeth, gums and other mouth structures for the presence of any disease or irregularities. Often, this will include a dental cleaning. In more thorough exams, the entire mouth, head and neck area will be examined.
More Information on Dental Examination: Oral Health Basics
- + Oral Food Challenge Test
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- Oral Food Challenge Test
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"Oral Food Challenge Test" is more commonly referred to as "Food Challenge Test" in the medical community.
Food Challenge Test
Also Known As: "Double Blind Food Challenge, Double Masked Food Challenge"
A highly accurate method to determine the cause of food allergy. A patient consumes capsules which hide different foods, as a physician observes for signs of an allergic reaction.
More Information on Food Challenge Test: Food Allergy & Intolerance
- + Oral Glucose Tolerance Test
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- Oral Glucose Tolerance Test
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"Oral Glucose Tolerance Test" is more commonly referred to as "Glucose Tests" in the medical community.
Glucose Tests
Also Known As: "Random Glucose, Glucose Tolerance Test, Serum Glucose, Fasting Glucose, Glucose Blood Test, Postprandial Blood Glucose, OGTT"
A blood test to examine the level of sugar (glucose) in the blood. Levels of glucose in the blood may be measured after a fast (fasting glucose) or after a meal (postprandial glucose). These tests are essential for diabetes diagnosis and management.
More Information on Glucose Tests: Diabetes & Endocrine Tests
- + Oral Health & Diet
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- Oral Health & Diet
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Also Known As: "Teeth & Diet"
Avoiding sugar-filled sodas, sweetened fruit drinks and non-nutritious snack foods can help prevent damage to a patient's oral health. Plaque combines with sugar or starch in the mouth to produce acid, which attacks the teeth.
More Information on Oral Health & Diet: Oral Health Basics
- + Oral Hygiene
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- Oral Hygiene
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"Oral Hygiene" is more commonly referred to as "Dental Health Basics" in the medical community.
Dental Health Basics
Also Known As: "Dental Hygiene"
Basic oral hygiene can keep teeth and gums healthy for a lifetime. Experts recommend brushing at least twice daily, flossing once daily and having teeth professionally cleaned every six months.
More Information on Dental Health Basics: Oral Health Basics
- + Oral Hypoglycemic Agents
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- Oral Hypoglycemic Agents
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"Oral Hypoglycemic Agents" is more commonly referred to as "Antidiabetic Agents" in the medical community.
Antidiabetic Agents
Also Known As: "Antihyperglycemic Agents, Hypoglycemic Agents"
Medications used primarily in treatment of type 2 diabetes. They act in varying ways to decrease the amount of glucose circulating in the blood (e.g., slowing digestion, increasing insulin production or absorption). In addition to pills, there are two new injected medications, one of which is approved to treat type 1 diabetes.
More Information on Antidiabetic Agents: Diabetes & Endocrine Drugs
- + Oral Irrigator
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- Oral Irrigator
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An appliance that shoots high-pressure streams of water onto and between teeth to help reduce plaque buildup and gingivitis. It can be battery-operated or electric.
More Information on Oral Irrigator: Oral Health Basics
- + Oral Malodor
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- Oral Malodor
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"Oral Malodor" is more commonly referred to as "Halitosis" in the medical community.
Halitosis
Also Known As: "Bad Breath"
An unpleasant odor in the mouth that may be caused by tooth decay, smoking, gum disease, digestive problems or certain other diseases.
More Information on Halitosis: Mouth & Tongue Disorders
- + Oral Medicine
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- Oral Medicine
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Medications that patients take by mouth. These may include pills, tablets, capsules and liquid solutions.
More Information on Oral Medicine: Oral Medications
- + Oral Mucosa
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- Oral Mucosa
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The moist, pink-red tissues that line the mouth. Glands along the mucosa secrete a thick fluid called mucus.
More Information on Oral Mucosa: Oral Health Basics
- + Oral Mucositis
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- Oral Mucositis
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"Oral Mucositis" is more commonly referred to as "Mouth Sores" in the medical community.
Mouth Sores
Annoying, often painful injuries to the tissue that may be symptoms of a disease or disorder. Examples include canker sores, cold sores, leukoplakia and candidiasis. A dentist should examine any mouth sore that lasts a week or longer.
More Information on Mouth Sores: Oral Signs & Symptoms
- + Oral Pathologist
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- Oral Pathologist
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A specialist who helps to diagnose serious dental and facial cavity diseases. Typically, a general dentist removes a portion of a patient's affected tissue that the oral pathologist analyzes for signs of cancerous or infectious disease.
More Information on Oral Pathologist: Oral Health Basics
- + Oral Piercing
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- Oral Piercing
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Also Known As: "Tongue Piercing, Lip Piercing"
Piercing of areas in or around the mouth (e.g., tongue, lip). Side effects can include pain, swelling, infection, increased flow of saliva, injuries to the gum tissue and severe bleeding that is difficult to control.
More Information on Oral Piercing: Mouth & Tongue Disorders
- + Oral Rehydration Solution
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- Oral Rehydration Solution
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Also Known As: "ORS"
A special mixture of water, glucose and electrolytes that is considered the best option for replacing fluid lost through severe diarrhea and vomiting. It is available over-the-counter as a liquid, gelatin or as frozen popsicles.
More Information on Oral Rehydration Solution: Digestive Treatments
- + Oral Surgeon
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- Oral Surgeon
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Also Known As: "Maxillofacial Surgeon"
Dental specialist who diagnoses and surgically treats problems related to the oral and maxillofacial regions. Examples include injuries from accidents, tumors in the jaw or mouth, and complicated dental procedures.
More Information on Oral Surgeon: Oral Health Basics
- + Oral Surgery
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- Oral Surgery
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Any surgical procedure that is focused on the mouth, jaws, face, neck and associated regions.
More Information on Oral Surgery: Oral Health Basics
- + Oral Thrush
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- Oral Thrush
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"Oral Thrush" is more commonly referred to as "Thrush" in the medical community.
Thrush
Also Known As: "Thrush Mouth, Tongue Candidiasis, Tinea Nigra, Mouth Candidiasis, Oropharyngeal Candidiasis, OPC, Oral Candidiasis"
A yeast infection of the mouth characterized by whitish patches on the corners of the mouth, insides of the cheeks, tongue, palate and throat. It is caused by overgrowth of Candida fungus and is common in babies.
More Information on Thrush: Oral Infections
- + Oral Thrush in Newborns
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- Oral Thrush in Newborns
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"Oral Thrush in Newborns" is more commonly referred to as "Thrush in Newborns" in the medical community.
Thrush in Newborns
A yeast infection of the mouth characterized by whitish patches. It is due to overgrowth of the Candida fungus and is common in babies who breastfeed.
More Information on Thrush in Newborns: Newborn Care
- + Orbital Edema
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- Orbital Edema
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"Orbital Edema" is more commonly referred to as "Edema" in the medical community.
Edema
Also Known As: "Fluid Retention, Anasarca, Pitting Edema, Cardiac Edema, Dependent Edema"
A condition in which the tissues of part(s) of the body (e.g., the legs, ankles and hands) become filled with fluid, often leading to swelling. This can signal a serious underlying cause, such as congestive heart failure.
More Information on Edema: Heart Signs & Symptoms
- + Orchidectomy
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- Orchidectomy
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Also Known As: "Surgical Castration"
Surgical removal of one or both testicles.
More Information on Orchidectomy: Prostate & Testicular
- + Orchiectomy
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- Orchiectomy
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Also Known As: "Orchidectomy, Surgical Castration"
Surgical removal of one or both testicles.
More Information on Orchiectomy: Prostate & Testicular
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- + Orchitis
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- Orchitis
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Inflammation of one or both of the testes. Mumps or other infections can cause this painful swelling, as can trauma or cancer that has moved from another site (metastasis).
More Information on Orchitis: Prostate & Testicular
- + Ordinary Headache
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- Ordinary Headache
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"Ordinary Headache" is more commonly referred to as "Tension Headache" in the medical community.
Tension Headache
Also Known As: "Tension Type Headache, Depressive Headache, Stress Headache, Muscle Contraction Headache, Essential Headache, Psychogenic Headache"
Head pain related to muscle tightening in the head, neck or scalp. It is the most common headache and is usually mild, but can become chronic in some patients. It does not involve the severe pain, nausea or vision problems associated with migraines.
More Information on Tension Headache: Headache & Migraine
- + Orexin
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- Orexin
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A class of hormones in the brain that may affect food consumption.
- + Organ & Tissue Donation
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- Organ & Tissue Donation
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One person can help up to seven others through organ donation and more than 50 others through donated tissue, such as corneas, heart valves, skin, bone and connective tissue. Making the decision in advance allows less strain on the next of kin.
More Information on Organ & Tissue Donation: Healthcare Basics
- + Organ Procurement Organization
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- Organ Procurement Organization
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Also Known As: "OPO"
Independent and hospital-based organizations that coordinate the organ donation and recovery process upon the death of a potential donor. OPOs screen for donor suitability and work with families and medical providers during organ recovery.
- + Organelles
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- Organelles
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Any structure that occurs in cells and that has a specialized function. Examples of such microscopic structures found in cytoplasm include the nucleus, mitochondria and endoplasmic reticulum.
- + Organic
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- Organic
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Also Known As: "Organic Foods"
Foods grown or raised without synthetic fertilizers, pesticides or hormones.
- + Organic Foods
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- Organic Foods
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Foods grown or raised without synthetic fertilizers, pesticides or hormones.
- + Organic Sulfur Compounds
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