HDL: Abbreviation for high-density lipoprotein, the so-called good cholesterol. This lipoprotein (a substance made up of fats and protein) is believed to remove cholesterol from the arteries.
Created: 2024-12-06 09:51:47
Last Updated: 2024-12-06 09:51:47
HEPA filter: Abbreviation for high-efficiency particulate air, a type of highly efficient air filter.
Created: 2024-12-06 09:51:54
Last Updated: 2024-12-06 09:51:54
HIV: Abbreviation for human immunodeficiency virus, the virus that leads to acquired immunodeficiency syndrome (AIDS). HIV damages immune cells so that they are no longer able to fight off other infections.
Created: 2024-12-06 09:51:58
Last Updated: 2024-12-06 09:51:58
HLA: Abbreviation for human leukocyte antigen, a protein found on the surface of white blood cells that helps the body recognize and fight foreign substances.
Created: 2024-12-06 09:52:02
Last Updated: 2024-12-06 09:52:02
HPA: Abbreviation for hypothalamic-pituitary-adrenal axis, a system that controls many hormonal activities in the body, including the stress response.
Created: 2024-12-06 09:52:06
Last Updated: 2024-12-06 09:52:06
HV.2.1 (Hyperion):Identified in early 2024, Hyperion demonstrated immune evasion properties but mild clinical presentations. CT imaging showed localized ground-glass opacities in rare severe cases.
Created: 2024-12-06 09:52:20
Last Updated: 2024-12-06 09:52:20
Haemophilus influenzae: A Gram-negative bacterium responsible for respiratory infections such as pneumonia, bronchitis, and meningitis.
Created: 2024-12-07 14:28:06
Last Updated: 2024-12-07 14:28:06
Haglunds Deformity: A bony enlargement on the back of the heel, often causing irritation and pain.
Created: 2024-12-06 09:52:31
Last Updated: 2024-12-06 09:52:31
Half-Life of Radioactive Isotopes: The time it takes for half of the radioactive atoms in a sample to decay, which influences how long a material remains hazardous.
Created: 2024-12-06 09:52:39
Last Updated: 2024-12-06 09:52:39
Half-life (T½): The time it takes for half of the atoms in a sample of a radioactive substance to decay, often expressed in seconds, minutes, hours, or years.
Created: 2024-12-06 09:52:56
Last Updated: 2024-12-06 09:52:56
Hallux Rigidus: Stiffness and pain in the big toe due to arthritis or bone spurs.
Created: 2024-12-06 09:53:13
Last Updated: 2024-12-06 09:53:13
Hammertoe: A deformity causing a toe to bend downward at the middle joint.
Created: 2024-12-06 09:53:20
Last Updated: 2024-12-06 09:53:20
Hand Lateral Protocol: Patient Positioning: Supine or seated with the hand in true lateral position; Imaging Settings: 60–70 kVp, 3–5 mAs; Common Views: Lateral view to assess fractures, dislocations, and joint spaces.
Created: 2024-12-06 09:53:28
Last Updated: 2024-12-06 09:53:28
Hand Surgeon: A surgeon specializing in treating hand and wrist disorders, including fractures, tendon injuries, and carpal tunnel syndrome.
Created: 2024-12-07 14:28:23
Last Updated: 2024-12-07 14:28:23
Hard Palate: The bony front part of the roof of the mouth, separating the nasal cavity from the oral cavity.
Created: 2024-12-06 09:53:36
Last Updated: 2024-12-06 09:53:36
Hashimotos thyroiditis: A disease in which the bodys immune system prevents the thyroid gland from producing enough thyroid hormone.
Created: 2024-12-06 09:54:05
Last Updated: 2024-12-06 09:54:05
Hassium (Hs): A synthetic element, highly radioactive, with limited practical use, primarily used in research.
Created: 2024-12-06 09:54:12
Last Updated: 2024-12-06 09:54:12
Haversian Canal: The central channel within an osteon, containing blood vessels and nerves that nourish the bone.
Created: 2024-12-06 09:54:19
Last Updated: 2024-12-06 09:54:19
HbA1c: Abbreviation for hemoglobin A1c, the product formed by the attachment of glucose (blood sugar) to hemoglobin (a protein in red blood cells). A test for HbA1c is a useful measure of blood sugar control.
Created: 2024-12-06 09:54:23
Last Updated: 2024-12-06 09:54:23
Head and Neck Radiotherapy: Radiation treatment used for cancers located in the head and neck region, including oral cavity, throat, and larynx.
Created: 2024-12-06 09:54:30
Last Updated: 2024-12-06 09:54:30
Hearing and Audiology Center: A specialized facility for diagnosing and treating hearing-related disorders.
Created: 2024-12-07 17:14:39
Last Updated: 2024-12-07 17:14:39
Heart Failure: A condition where the heart is unable to pump blood efficiently, leading to fluid buildup and inadequate delivery of oxygen and nutrients to the body.
Created: 2024-12-06 09:54:44
Last Updated: 2024-12-06 09:54:44
Heart-Lung Machine: A device used in open-heart surgeries to maintain circulation and oxygenation during procedures when the heart and lungs are temporarily stopped.
Created: 2024-12-06 09:54:37
Last Updated: 2024-12-06 09:54:37
Heberdens nodes: Bony bumps found on the finger joints in some people with osteoarthritis.
Created: 2024-12-06 09:54:52
Last Updated: 2024-12-06 09:54:52
Helical tomotherapy: A form of radiation therapy that combines a CT scanner and a linear accelerator to deliver precise radiation treatments in a helical pattern around the patient.
Created: 2024-12-06 09:54:59
Last Updated: 2024-12-06 09:54:59
Helicase: An enzyme that unwinds the DNA double helix ahead of the replication fork during DNA replication.
Created: 2024-12-06 09:55:04
Last Updated: 2024-12-06 09:55:04
Helicobacter pylori: A Gram-negative bacterium linked to stomach ulcers and certain types of gastritis.
Created: 2024-12-07 10:51:45
Last Updated: 2024-12-07 10:51:45
Hemarthrosis: Bleeding into a joint space, often caused by trauma or clotting disorders.
Created: 2024-12-06 09:55:14
Last Updated: 2024-12-06 09:55:14
Hematocrit Test: A blood test that measures the percentage of red blood cells in the blood, used to diagnose anemia or other blood disorders.
Created: 2024-12-06 09:55:21
Last Updated: 2024-12-06 09:55:21
Hematologist: A doctor who specializes in blood-related conditions, including anemia, clotting disorders, and blood cancers like leukemia.
Created: 2024-12-07 14:28:46
Last Updated: 2024-12-07 14:28:46
Hematology Department: A facility specializing in blood-related diseases and disorders.
Created: 2024-12-07 17:14:39
Last Updated: 2024-12-07 17:14:39
Hematopoiesis: The process of blood cell formation, which occurs in the bone marrow.
Created: 2024-12-06 09:55:25
Last Updated: 2024-12-06 09:55:25
Hemoglobin Test: A blood test that measures the amount of hemoglobin, a protein in red blood cells that carries oxygen.
Created: 2024-12-06 09:55:31
Last Updated: 2024-12-06 09:55:31
Hemostats: Clamps used to control bleeding by constricting blood vessels or tissues during surgery.
Created: 2024-12-07 14:28:52
Last Updated: 2024-12-07 14:28:52
Hepatic Artery: Artery that supplies oxygenated blood to the liver, stomach, pancreas, and duodenum.
Created: 2024-12-06 09:55:38
Last Updated: 2024-12-06 09:55:38
Hepatitis C Antibody Test: A blood test that detects antibodies to the hepatitis C virus to assess exposure to the virus.
Created: 2024-12-06 09:55:45
Last Updated: 2024-12-06 09:55:45
Hepatocellular Carcinoma (HCC): The most common primary liver cancer, often related to chronic liver disease. CT or MRI shows arterial enhancement and washout in venous phases.
Created: 2024-12-06 09:55:53
Last Updated: 2024-12-06 09:55:53
Hepatologist: A doctor who specializes in the study and treatment of liver diseases, including hepatitis, cirrhosis, and liver transplants.
Created: 2024-12-07 14:29:00
Last Updated: 2024-12-07 14:29:00
Hepevirus: A family of RNA viruses, including hepatitis E virus, which primarily affects the liver and is transmitted via contaminated water or food.
Created: 2024-12-07 10:51:59
Last Updated: 2024-12-07 10:51:59
Herniated Disc: A condition in which the soft center of a spinal disc pushes through a crack in the tougher exterior casing.
Created: 2024-12-06 09:56:09
Last Updated: 2024-12-06 09:56:09
Herpesvirus: A family of DNA viruses that cause various diseases, including herpes simplex virus (HSV), varicella-zoster virus (VZV), and Epstein-Barr virus (EBV).
Created: 2024-12-07 10:52:07
Last Updated: 2024-12-07 10:52:07
Hertz-Schuller View Protocol: Patient Positioning: Upright with head tilted back and the chin raised; Imaging Settings: 70–80 kVp, 5–10 mAs; Common Views: Used for imaging the sphenoidal sinuses and petrous pyramids.
Created: 2024-12-06 09:56:17
Last Updated: 2024-12-06 09:56:17
Heterotopic Ossification: Abnormal bone formation in soft tissues, often after trauma or surgery.
Created: 2024-12-06 09:56:38
Last Updated: 2024-12-06 09:56:38
High-Dose-Rate (HDR) Radiation: A form of radiation therapy where high doses of radiation are delivered in short bursts, often in brachytherapy procedures.
Created: 2024-12-06 09:56:48
Last Updated: 2024-12-06 09:56:48
High-Energy X-rays: Radiation used in external beam radiotherapy to treat deep-seated tumors, providing high penetration to reach internal structures.
Created: 2024-12-06 09:57:01
Last Updated: 2024-12-06 09:57:01
High-dose rate (HDR) brachytherapy: A form of brachytherapy where a high dose of radiation is delivered in a short amount of time using a radioactive source placed near the tumor.
Created: 2024-12-06 09:57:09
Last Updated: 2024-12-06 09:57:09
Hilar Arteries: Arteries that supply blood to the lungs at the hilum, where the bronchi and vessels enter.
Created: 2024-12-06 09:57:16
Last Updated: 2024-12-06 09:57:16
Hinge Joint: A type of diarthrotic joint that allows movement in one plane, like the elbow or knee.
Created: 2024-12-06 09:57:23
Last Updated: 2024-12-06 09:57:23
Hip Dislocation: A displacement of the femoral head from the acetabulum, commonly caused by high-impact injuries.
Created: 2024-12-07 15:50:08
Last Updated: 2024-12-07 15:50:08
Hip Lateral Protocol: Patient Positioning: Lying on the affected side with the leg flexed and the central ray directed to the hip joint; Imaging Settings: 70–80 kVp, 5–10 mAs; Common Views: Lateral view to evaluate the acetabulum, femoral neck, and greater trochanter.
Created: 2024-12-06 09:57:29
Last Updated: 2024-12-06 09:57:29
Histones: Proteins that help package and organize DNA into structural units called nucleosomes.
Created: 2024-12-06 09:57:34
Last Updated: 2024-12-06 09:57:34
Histoplasma capsulatum: A dimorphic fungus responsible for histoplasmosis, which primarily affects the lungs and is commonly found in areas where bird or bat droppings accumulate.
Created: 2024-12-07 10:52:24
Last Updated: 2024-12-07 10:52:24
Histoplasmosis: A fungal infection that primarily affects the lungs, caused by inhaling spores from the fungus Histoplasma, often associated with bird or bat droppings.
Created: 2024-12-06 09:57:39
Last Updated: 2024-12-06 09:57:39
Hoffas Syndrome: Inflammation or impingement of the fat pad in the front of the knee.
Created: 2024-12-06 09:57:50
Last Updated: 2024-12-06 09:57:50
Holistic Health Center: A facility that emphasizes alternative and complementary treatments, such as herbal medicine and massage therapy.
Created: 2024-12-07 17:14:39
Last Updated: 2024-12-07 17:14:39
Holter monitor: A small machine worn for a day or more to continuously record the hearts electrical activity. Holter monitors are used to help diagnose heart rhythm problems.
Created: 2024-12-06 09:57:59
Last Updated: 2024-12-06 09:57:59
Home Health Care: A service that provides medical and personal care at patients' homes, especially for elderly or disabled individuals.
Created: 2024-12-07 17:14:39
Last Updated: 2024-12-07 17:14:39
Homozygous: A genotype where an individual has two identical alleles for a particular gene.
Created: 2024-12-06 09:58:05
Last Updated: 2024-12-06 09:58:05
Hospital: A healthcare facility providing medical and surgical treatment to patients.
Created: 2024-12-07 17:14:39
Last Updated: 2024-12-07 17:14:39
Human Papillomavirus (HPV) Test: A test that detects the presence of high-risk HPV strains, which can lead to cervical cancer.
Created: 2024-12-06 09:58:13
Last Updated: 2024-12-06 09:58:13
Humerus: The bone of the upper arm, extending from the shoulder to the elbow.
Created: 2024-12-06 09:58:26
Last Updated: 2024-12-06 09:58:26
Humerus Head: The rounded top of the humerus bone that forms the shoulder joint with the scapula.
Created: 2024-12-06 09:58:22
Last Updated: 2024-12-06 09:58:22
Huntingtons Disease: A genetic neurodegenerative disorder characterized by uncontrolled movements (chorea), cognitive decline, and psychiatric symptoms, caused by a mutation in the HTT gene.
Created: 2024-12-06 09:58:41
Last Updated: 2024-12-06 09:58:41
Hyaline Membrane Disease: A neonatal condition characterized by surfactant deficiency. Radiographically seen as a reticulogranular pattern with air bronchograms.
Created: 2024-12-06 09:58:49
Last Updated: 2024-12-06 09:58:49
Hybrid PET/MRI Scanner: A cutting-edge imaging device that combines the advantages of both PET and MRI, allowing for precise functional and anatomical imaging, often used in neurological and oncological diagnostics.
Created: 2024-12-03 21:24:59
Last Updated: 2024-12-03 21:24:59
Hybridization: The process of combining two complementary strands of DNA or RNA to form a double-stranded molecule.
Created: 2024-12-06 10:00:16
Last Updated: 2024-12-06 10:00:16
Hydralazine: A vasodilator used to treat high blood pressure.
Created: 2024-12-06 10:00:20
Last Updated: 2024-12-06 10:00:20
Hydrochlorothiazide: A thiazide diuretic used to treat high blood pressure and edema.
Created: 2024-12-06 13:10:54
Last Updated: 2024-12-06 13:10:54
Hydrocodone: An opioid used to treat moderate to severe pain and as a cough suppressant.
Created: 2024-12-06 10:17:51
Last Updated: 2024-12-06 10:17:51
Hydroxychloroquine: An antimalarial drug used to treat rheumatoid arthritis and lupus.
Created: 2024-12-06 10:17:54
Last Updated: 2024-12-06 10:17:54
Hydroxyurea: A chemotherapy agent used to treat various cancers and sickle cell anemia.
Created: 2024-12-06 10:17:58
Last Updated: 2024-12-06 10:17:58
Hymenolepis diminuta: A tapeworm typically infecting rodents but can infect humans, causing hymenolepiasis with similar symptoms to H. nana.
Created: 2024-12-07 10:52:48
Last Updated: 2024-12-07 10:52:48
Hyperfractionation: A treatment strategy where smaller doses of radiation are given multiple times per day, typically used for aggressive cancers.
Created: 2024-12-06 10:18:02
Last Updated: 2024-12-06 10:18:02
Hypermobile Joint Syndrome: Excessive joint flexibility leading to pain or instability.
Created: 2024-12-06 10:18:11
Last Updated: 2024-12-06 10:18:11
Hyperostosis: Abnormal thickening of bone tissue, often seen in conditions like DISH (Diffuse Idiopathic Skeletal Hyperostosis).
Created: 2024-12-06 10:18:15
Last Updated: 2024-12-06 10:18:15
Hyperparathyroidism: A condition where excessive parathyroid hormone leads to increased bone resorption and weakened bones.
Created: 2024-12-06 10:18:19
Last Updated: 2024-12-06 10:18:19
Hypertension: A condition in which the blood pressure in the arteries is persistently elevated, increasing the risk of heart disease, stroke, and kidney failure.
Created: 2024-12-06 10:18:23
Last Updated: 2024-12-06 10:18:23
Hypertensive Heart Disease: A condition where prolonged high blood pressure leads to structural and functional changes in the heart, including enlargement and thickening of the heart muscle.
Created: 2024-12-06 10:18:32
Last Updated: 2024-12-06 10:18:32
Hypertrophic Cardiomyopathy: A genetic condition where the heart muscle becomes abnormally thickened, often leading to obstructed blood flow and increased risk of sudden cardiac arrest.
Created: 2024-12-06 10:19:14
Last Updated: 2024-12-06 10:19:14
Hypofractionated Radiotherapy: A treatment strategy in which higher doses of radiation are delivered in fewer treatment sessions, often used in breast cancer treatment.
Created: 2024-12-06 10:19:21
Last Updated: 2024-12-06 10:19:21
Hypofractionation: A radiotherapy approach where larger doses are given over fewer sessions, often used for certain types of cancer.
Created: 2024-12-06 10:19:26
Last Updated: 2024-12-06 10:19:26
Hypoparathyroidism: A condition where insufficient parathyroid hormone leads to low blood calcium and bone problems.
Created: 2024-12-06 10:19:31
Last Updated: 2024-12-06 10:19:31
Hypoxemia: A condition where there is an abnormally low level of oxygen in the blood, leading to symptoms such as shortness of breath, confusion, and fatigue.
Created: 2024-12-06 10:19:35
Last Updated: 2024-12-06 10:19:35
Hysterectomy Instruments: Specialized tools for performing a hysterectomy, including uterine manipulators, forceps, and retractors.
Created: 2024-12-07 17:22:05
Last Updated: 2024-12-07 17:22:05
hair shaft: The portion of hair that extends beyond the surface of the skin. It contains three layers: the cuticle, cortex, and medulla (not always present).
Created: 2024-12-06 12:33:09
Last Updated: 2024-12-06 12:33:09
hallucination: A perception of something that is not really there.
Created: 2024-12-06 12:33:02
Last Updated: 2024-12-06 12:33:02
hammertoe: A sometimes painful condition in which the toe curls up and under (resembling a hammer).
Created: 2024-12-06 12:32:59
Last Updated: 2024-12-06 12:32:59
happiness set-point: An individual's baseline level of happiness, determined largely by genetics, around which moods fluctuate. After reacting to positive or negative life changes, people tend to return to their happiness set-points.
Created: 2024-12-06 12:32:54
Last Updated: 2024-12-06 12:32:54
harm reduction therapy: A treatment strategy aimed at minimizing the harm associated with an object of addiction. This strategic approach helps people learn how to limit the degree to which they use their object of addiction, or limit the risks associated with their use, but they do not necessarily stop altogether.
Created: 2024-12-06 12:32:43
Last Updated: 2024-12-06 12:32:43
hay fever: A commonly used term for allergic rhinitis�seasonal or year-round allergic condition marked by sneezing, runny nose, and congestion. The most common type of allergy, it is caused by an IgE-mediated immune response to inhaled airborne allergens.
Created: 2024-12-06 12:32:36
Last Updated: 2024-12-06 12:32:36
health care proxy: A legal form allowing a person to appoint someone else to make their medical decisions. Also known as a durable power of attorney for health care.
Created: 2024-12-06 12:32:30
Last Updated: 2024-12-06 12:32:30
hearing aid: An electronic device worn in or behind the ear by people with hearing problems that makes sounds louder.
Created: 2024-12-06 12:32:24
Last Updated: 2024-12-06 12:32:24
heart rate: The number of times the heart contracts in a minute, normally 60 100 times.
Created: 2024-12-06 12:32:18
Last Updated: 2024-12-06 12:32:18
heartburn: A burning pain in the chest or throat, caused when stomach acid backs up into the esophagus.
Created: 2024-12-06 12:32:09
Last Updated: 2024-12-06 12:32:09
hedonic treadmill: The human tendency to adapt to new circumstances and eventually consider them to be normal, so the emotional effects (negative or positive) generated by a change fade over time.
Created: 2024-12-06 12:32:04
Last Updated: 2024-12-06 12:32:04
heel spur: An abnormal growth of bone or calcium on the heel bone.
Created: 2024-12-06 12:31:55
Last Updated: 2024-12-06 12:31:55
helper T cells: Cells that help fight disease by activating and directing other immune system cells.
Created: 2024-12-06 12:31:48
Last Updated: 2024-12-06 12:31:48
hematemesis: The vomiting of bright red blood, indicating bleeding in the upper digestive tract.
Created: 2024-12-06 12:31:41
Last Updated: 2024-12-06 12:31:41
hematoma: Blood that leaks out of blood vessels and collects in the body.
Created: 2024-12-06 12:31:38
Last Updated: 2024-12-06 12:31:38
hematuria: Blood in the urine.
Created: 2024-12-06 12:31:34
Last Updated: 2024-12-06 12:31:34
hemianopia: Poor vision or blindness in half of the visual field, affecting one or both eyes.
Created: 2024-12-06 12:31:29
Last Updated: 2024-12-06 12:31:29
hemiparesis: Muscle weakness on one side of the body.
Created: 2024-12-06 12:31:22
Last Updated: 2024-12-06 12:31:22
hemiplegia: Paralysis on one side of the body.
Created: 2024-12-06 12:31:15
Last Updated: 2024-12-06 12:31:15
hemochromatosis: A genetic condition in which the body absorbs and stores too much iron.
Created: 2024-12-06 12:31:12
Last Updated: 2024-12-06 12:31:12
hemodialysis: The use of a machine to remove wastes and impurities from the blood when the kidneys are not working properly.
Created: 2024-12-06 12:31:09
Last Updated: 2024-12-06 12:31:09
hemoglobin: The oxygen-carrying substance that gives red blood cells their color.
Created: 2024-12-06 12:31:05
Last Updated: 2024-12-06 12:31:05
hemoptysis: Coughing up or spitting up blood from the lungs.
Created: 2024-12-06 12:31:02
Last Updated: 2024-12-06 12:31:02
hemorrhage: Bleeding from a damaged blood vessel.
Created: 2024-12-06 12:30:59
Last Updated: 2024-12-06 12:30:59
hemorrhagic stroke: A type of stroke that occurs when a blood vessel leaks or bursts inside the brain, cutting off the supply of oxygen and nutrition to that part of the brain.
Created: 2024-12-06 12:30:56
Last Updated: 2024-12-06 12:30:56
heparin: A drug that prevents blood from clotting.
Created: 2024-12-06 12:30:47
Last Updated: 2024-12-06 12:30:47
herd immunity: Protection occurring when so many people in a region are immune to an infectious disease that it can not spread to others.
Created: 2024-12-06 12:30:43
Last Updated: 2024-12-06 12:30:43
herniated disk: When part of a spinal disk bulges out of a tear or weak spot in the disks tough outer shell. Also known as prolapsed disk.
Created: 2024-12-06 12:30:33
Last Updated: 2024-12-06 12:30:33
herpes zoster: A painful blistering skin rash caused by the chicken pox virus; also known as shingles.
Created: 2024-12-06 12:30:23
Last Updated: 2024-12-06 12:30:23
hertz: The measurement of a sounds frequency.
Created: 2024-12-06 12:30:17
Last Updated: 2024-12-06 12:30:17
hiatal hernia: When part of the stomach pushes upward into the chest through an abnormal opening in the diaphragm.
Created: 2024-12-06 12:30:12
Last Updated: 2024-12-06 12:30:12
high blood pressure: When blood flowing through arteries pushes on artery walls with abnormally high force over a sustained period of time. Also called hypertension.
Created: 2024-12-06 12:29:52
Last Updated: 2024-12-06 12:29:52
high-density lipoprotein: So-called good cholesterol. This lipoprotein (a substance made of fat and protein) removes cholesterol from arteries.
Created: 2024-12-06 12:30:06
Last Updated: 2024-12-06 12:30:06
high-intensity focused ultrasound: A treatment that destroys tumors with heat generated by ultrasound energy.
Created: 2024-12-06 12:29:59
Last Updated: 2024-12-06 12:29:59
hippocampus: Part of the brain that plays an important role in processing long-term memories.
Created: 2024-12-06 12:29:46
Last Updated: 2024-12-06 12:29:46
hirsutism: Excessive facial or body hair in women.
Created: 2024-12-06 12:29:43
Last Updated: 2024-12-06 12:29:43
histamine: A substance released by the immune system when it is exposed to an allergen. Histamines cause many allergy symptoms.
Created: 2024-12-06 12:29:40
Last Updated: 2024-12-06 12:29:40
hives: An itchy rash of usually short duration. Also known as urticaria.
Created: 2024-12-06 12:29:36
Last Updated: 2024-12-06 12:29:36
homeostasis: The bodys ability to keep blood pressure, temperature, water levels, oxygen levels, and more set at the right levels for cells to survive.
Created: 2024-12-06 12:29:33
Last Updated: 2024-12-06 12:29:33
homocysteine: An amino acid formed as part of the normal breakdown of protein.
Created: 2024-12-06 12:29:28
Last Updated: 2024-12-06 12:29:28
homocystinuria: A rare genetic disease that causes blood levels of homocysteine to rise too high.
Created: 2024-12-06 12:29:23
Last Updated: 2024-12-06 12:29:23
hormone therapy: Use of medications to boost levels of hormones that decrease with age.
Created: 2024-12-06 12:29:19
Last Updated: 2024-12-06 12:29:19
hormones: Powerful chemicals that affect many processes in the body, including sexual function, mood, and growth.
Created: 2024-12-06 12:29:14
Last Updated: 2024-12-06 12:29:14
host: A person or other living organism that can be infected by a virus or other pathogen under natural conditions.
Created: 2024-12-06 12:29:11
Last Updated: 2024-12-06 12:29:11
hot flash: A sudden, intense, hot feeling in the face or upper part of the body, along with rapid heartbeat, sweating, and flushing. A symptom of menopause.
Created: 2024-12-06 12:29:08
Last Updated: 2024-12-06 12:29:08
human leukocyte antigen: A protein found on the surface of white blood cells that helps the body recognize and fight foreign substances.
Created: 2024-12-06 12:29:02
Last Updated: 2024-12-06 12:29:02
humectant: An agent used in moisturizers; binds water to the skin to promote hydration.
Created: 2024-12-06 12:28:55
Last Updated: 2024-12-06 12:28:55
humoral immunity: Immunity from infection and disease that comes from the release of antibodies in the blood.
Created: 2024-12-06 12:28:52
Last Updated: 2024-12-06 12:28:52
hyaluronic acid: A hydrating sugar secreted by cells.
Created: 2024-12-06 12:28:45
Last Updated: 2024-12-06 12:28:45
hydrogen breath test: A test used to diagnose gastrointestinal problems; it measures the amount of hydrogen in the breath, which rise when food is not being absorbed properly.
Created: 2024-12-07 23:35:05
Last Updated: 2024-12-07 23:35:05
hydrogenation: The addition of hydrogen to a compound. Hydrogenation is used to solidify liquid vegetable oils. The process creates trans fats, which are harmful to the heart and blood vessels.
Created: 2024-12-06 12:28:34
Last Updated: 2024-12-06 12:28:34
hydroxyapatite: A hard substance that is a major component of bones and teeth.
Created: 2024-12-06 12:28:29
Last Updated: 2024-12-06 12:28:29
hygiene hypothesis: The theory that modern cleanliness means children are not exposed to as many germs at an early age, which results in a more allergies.
Created: 2024-12-06 12:28:26
Last Updated: 2024-12-06 12:28:26
hyperaldosteronism: Overproduction of the hormone aldosterone, which causes the kidneys to retain sodium and water, often leading to high blood pressure.
Created: 2024-12-06 12:28:18
Last Updated: 2024-12-06 12:28:18
hyperalgesia: An increased sensitivity to pain.
Created: 2024-12-06 12:28:14
Last Updated: 2024-12-06 12:28:14
hypercholesterolemia: High levels of cholesterol in the blood.
Created: 2024-12-06 12:28:10
Last Updated: 2024-12-06 12:28:10
hyperglycemia: An abnormally high amount of sugar in the blood.
Created: 2024-12-06 12:28:06
Last Updated: 2024-12-06 12:28:06
hyperinsulinemia: High levels of insulin in the bloodstream.
Created: 2024-12-06 12:28:03
Last Updated: 2024-12-06 12:28:03
hyperlipidemia: High levels of blood lipids (fats and waxes such as cholesterol).
Created: 2024-12-06 12:27:58
Last Updated: 2024-12-06 12:27:58
hyperopia: Difficulty seeing objects that are nearby; farsightedness.
Created: 2024-12-06 12:27:55
Last Updated: 2024-12-06 12:27:55
hyperparathyroidism: Overproduction by the thyroid glands of parathyroid hormone.
Created: 2024-12-06 12:27:51
Last Updated: 2024-12-06 12:27:51
hyperplasia: Increased production of cells in a normal tissue or organ; may be harmless or a sign of precancerous changes.
Created: 2024-12-06 12:27:48
Last Updated: 2024-12-06 12:27:48
hyperplastic polyp: Noncancerous growths commonly found in the colon and rectum.
Created: 2024-12-06 12:27:45
Last Updated: 2024-12-06 12:27:45
hypertension: The medical term for high blood pressure. Hypertension is a major risk factor for stroke, especially hemorrhagic and lacunar strokes, because it puts excess stress on the walls of blood vessels and damages their delicate inner lining.
Created: 2024-12-06 12:27:39
Last Updated: 2024-12-06 12:27:39
hypertensive intracerebral hemorrhage: A stroke in which high blood pressure causes a blood vessel deep in the brain to rupture.
Created: 2024-12-06 12:27:35
Last Updated: 2024-12-06 12:27:35
hyperthyroidism: A condition in which the thyroid gland makes too much thyroid hormone.
Created: 2024-12-06 12:27:28
Last Updated: 2024-12-06 12:27:28
hypertriglyceridemia: High levels of triglycerides in the blood. A normal triglyceride level is less than 150 mg/dL.
Created: 2024-12-06 12:27:24
Last Updated: 2024-12-06 12:27:24
hyperuricemia: Abnormally high levels of uric acid in the blood.
Created: 2024-12-06 12:27:21
Last Updated: 2024-12-06 12:27:21
hypnagogic hallucinations: Vivid dream-like sounds or images that occur while on the verge of falling asleep.
Created: 2024-12-06 12:27:17
Last Updated: 2024-12-06 12:27:17
hypnogram: A diagram that summarizes the stages of sleep recorded in a sleep laboratory.
Created: 2024-12-06 12:27:10
Last Updated: 2024-12-06 12:27:10
hypnotic: An agent that promotes and aids sleep.
Created: 2024-12-06 12:27:07
Last Updated: 2024-12-06 12:27:07
hypoglycemia: A condition in which blood sugar drops to an abnormally low level.
Created: 2024-12-06 12:27:04
Last Updated: 2024-12-06 12:27:04
hypogonadism: Extremely low levels of testosterone in circulation.
Created: 2024-12-06 12:26:58
Last Updated: 2024-12-06 12:26:58
hypomania: A mild form of mania, in which a person has lots of energy, talks faster than normal, has racing thoughts, and elevated mood.
Created: 2024-12-06 12:26:55
Last Updated: 2024-12-06 12:26:55
hypopnea: Breathing that is more shallow and slow than normal.
Created: 2024-12-06 12:26:52
Last Updated: 2024-12-06 12:26:52
hypotension: The medical term for low blood pressure.
Created: 2024-12-06 12:26:49
Last Updated: 2024-12-06 12:26:49
hypothalamic-pituitary-adrenal axis: A system that controls many hormonal activities in the body, including the stress response. Often called the HPA axis.
Created: 2024-12-06 12:26:45
Last Updated: 2024-12-06 12:26:45
hypothalamus: A small area in the brain that produces hormones that control body temperature, hunger, moods, the stress response, and other key functions.
Created: 2024-12-06 12:26:37
Last Updated: 2024-12-06 12:26:37
hypothyroidism: A disease in which the thyroid gland does not make enough thyroid hormone.
Created: 2024-12-06 12:26:33
Last Updated: 2024-12-06 12:26:33
hypoxia: When all or part of the body does not get enough oxygen.
Created: 2024-12-06 12:26:30
Last Updated: 2024-12-06 12:26:30
hysterectomy: An operation to remove a womans uterus.
Created: 2024-12-06 12:26:23
Last Updated: 2024-12-06 12:26:23