Health Terms starting with X
Common Health Terms | All Health Terms
X Chromosome - The female sex chromosome, being the differential sex chromosome carried by half the male gametes an...
X Chromosome Inactivation - A dosage compensation process occurring at an early embryonic stage in mammalian development whereby...
Xamoterol - A selective beta-1-adrenergic partial agonist. Because it is a partial agonist (DRUG PARTIAL AGONISM...
Xanthenes - Compounds with three aromatic rings in linear arrangement with an OXYGEN in the center ring....
Xanthine - A purine base found in most body tissues and fluids, certain plants, and some urinary calculi. It is...
Xanthine Dehydrogenase - An enzyme that catalyzes the oxidation of XANTHINE in the presence of NAD+ to form URIC ACID and NAD...
Xanthine Oxidase - An iron-molybdenum flavoprotein containing FLAVIN-ADENINE DINUCLEOTIDE that oxidizes hypoxanthine, s...
Xanthines - Purine bases found in body tissues and fluids and in some plants....
Xanthinol Niacinate - A vasodilator used in peripheral vascular disorders and insufficiency. It may cause gastric discomfo...
Xanthium - A plant genus of the family ASTERACEAE. The name "prickly burweed" is sometimes used but causes conf...
Xanthobacter - A genus of gram-negative, aerobic, rod-shaped bacteria found in wet soil containing decaying organic...
Xanthogranuloma, Juvenile - Benign disorder of infants and children caused by proliferation of HISTIOCYTES, macrophages found in...
Xanthomatosis - A condition marked by the development of widespread xanthomas, yellow tumor-like structures filled w...
Xanthomatosis, Cerebrotendinous - An autosomal recessive lipid storage disorder due to mutation of the gene CYP27A1 encoding sterol 27...
Xanthomonadaceae - A family of gram-negative bacteria, in the order Xanthomonadales, pathogenic to plants....
Xanthomonas - A genus in the family XANTHOMONADACEAE whose cells produce a yellow pigment (Gr. xanthos - yellow). ...
Xanthomonas axonopodis - A species of gram-negative bacteria in the genus XANTHOMONAS, which causes citrus cankers and black ...
Xanthomonas campestris - A species of gram-negative, aerobic bacteria that is pathogenic for plants....
Xanthomonas vesicatoria - A species of gram-negative bacteria, in the genus XANTHOMONAS, causing disease in TOMATO and pepper ...
Xanthones - A group of XANTHENES that contain a 9-keto OXYGEN....
Xanthophylls - Oxygenated forms of carotenoids. They are usually derived from alpha and beta carotene....
Xanthopterin - 2-Amino-1,5-dihydro-4,6-pteridinedione. Pigment first discovered in butterfly wings and widely distr...
Xanthorhiza - A plant genus of the family RANUNCULACEAE. Members contain isoquinoline alkaloids....
Xanthosoma - A plant genus of the family ARACEAE. The common names of 'Coco Yam' (Cocoyam) or 'Elephant's Ear' m...
Xedar Receptor - An ectodysplasin receptor subtype that is specific for ECTODYSPLASIN A2. Unlike the EDAR RECEPTOR th...
Xenarthra - An order of New World mammals characterized by the absence of incisors and canines from among their ...
Xenobiotics - Chemical substances that are foreign to the biological system. They include naturally occurring comp...
Xenodiagnosis - A method for diagnosing a disease in one organism by inoculating the putative causative organism in ...
Xenograft Model Antitumor Assays - In vivo methods of screening investigative anticancer drugs, biologic response modifiers or radiothe...
Xenon - A noble gas with the atomic symbol Xe, atomic number 54, and atomic weight 131.30. It is found in th...
Xenon Isotopes - Stable xenon atoms that have the same atomic number as the element xenon, but differ in atomic weigh...
Xenon Radioisotopes - Unstable isotopes of xenon that decay or disintegrate emitting radiation. Xe atoms with atomic weigh...
Xenopus - An aquatic genus of the family, Pipidae, occurring in Africa and distinguished by having black horny...
Xenopus laevis - The commonest and widest ranging species of the clawed "frog" (Xenopus) in Africa. This species is u...
Xenopus Proteins - Proteins obtained from various species of Xenopus. Included here are proteins from the African claw...
Xenorhabdus - A genus of gram-negative, facultatively anaerobic rod-shaped cells which are motile by peritrichous ...
Xeroderma Pigmentosum - A rare, pigmentary, and atrophic autosomal recessive disease. It is manifested as an extreme photose...
Xeroderma Pigmentosum Group A Protein - A ZINC FINGER MOTIF protein that recognizes and interacts with damaged DNA. It is a DNA-binding prot...
Xeroderma Pigmentosum Group D Protein - A DNA helicase that is a component of TRANSCRIPTION FACTOR TFIIH. It plays an essential role in NUCL...
Xeromammography - Xeroradiography of the breast....
Xerophthalmia - Dryness of the eye surfaces caused by deficiency of tears or conjunctival secretions. It may be asso...
Xeroradiography - A photoelectric method of recording an X-ray image on a coated metal plate, using low-energy photon ...
Xerostomia - Decreased salivary flow....
Xestospongia - A genus of SPONGES in the family Petrosiidae, characterized by an ectosomal skeleton consisting only...
Xipamide - A sulfamoylbenzamide analog of CLOPAMIDE. It is diuretic and saluretic with antihypertensive activit...
Xipapillomavirus - A genus of DNA viruses in the family PAPILLOMAVIRIDAE, causing cutaneous or mucosal papillomas in ca...
X-Linked Combined Immunodeficiency Diseases - Forms of combined immunodeficiency caused by mutations in the gene for INTERLEUKIN RECEPTOR COMMON G...
X-Linked Inhibitor of Apoptosis Protein - An inhibitor of apoptosis protein that is translated by a rare cap-independent mechanism. It blocks ...
X-Ray Absorption Spectroscopy - Analysis of the energy absorbed across a spectrum of x-ray energies/wavelengths to determine the che...
X-Ray Diffraction - The scattering of x-rays by matter, especially crystals, with accompanying variation in intensity du...
X-Ray Film - A film base coated with an emulsion designed for use with x-rays....
X-Ray Intensifying Screens - Screens which absorb the energy in the x-ray beam that has penetrated the patient and convert this e...
X-Ray Microtomography - X-RAY COMPUTERIZED TOMOGRAPHY with resolution in the micrometer range....
X-Rays - Penetrating electromagnetic radiation emitted when the inner orbital electrons of an atom are excite...
Xylan Endo-1,3-beta-Xylosidase - A xylosidase that catalyses the random hydrolysis of 1,3-beta-D-xylosidic linkages in 1,3-beta-D-xyl...
Xylans - Polysaccharides consisting of xylose units....
Xylariales - An order of ascomycetous FUNGI which includes many economically important plant parasites as well as...
Xylazine - An adrenergic alpha-agonist used as a sedative, analgesic, and muscle relaxant in veterinary medicin...
Xylella - A genus of gram-negative, aerobic bacteria, in the family XANTHOMONADACEAE. It is found in the xylem...
Xylem - Plant tissue that carries water up the root and stem. Xylem cell walls derive most of their strength...
Xylenes - A family of isomeric, colorless aromatic hydrocarbon liquids, that contain the general formula C6H4(...
Xylitol - A five-carbon sugar alcohol derived from XYLOSE by reduction of the carbonyl group. It is as sweet a...
Xylopia - A plant genus of the family ANNONACEAE. Members contain DITERPENES....
Xylosidases - A group of enzymes that catalyze the hydrolysis of alpha- or beta-xylosidic linkages. EC 3.2.1.8 cat...
Xylulose - A 5-carbon keto sugar....
XYY Karyotype - Abnormal genetic constitution in males characterized by an extra Y chromosome....
Common Chronic Illnesses
Coronary Disease
An imbalance between myocardial functional requirements and the capacity of the CORONARY VESSELS to supply sufficient blood flow. It is a form of MYOCARDIAL ISCHEMIA (insufficient blood supply to the heart muscle) caused by a decreased capacity of the coronary vessels.
Diabetes Mellitus, Type 1
A subtype of DIABETES MELLITUS that is characterized by INSULIN deficiency. It is manifested by the sudden onset of severe HYPERGLYCEMIA, rapid progression to DIABETIC KETOACIDOSIS, and DEATH unless treated with insulin. The disease may occur at any age, but is most common in childhood or adolescence.
Diabetes Supplies | Diabetic Groups
Diabetes Mellitus, Type 2
A subclass of DIABETES MELLITUS that is not INSULIN-responsive or dependent (NIDDM). It is characterized initially by INSULIN RESISTANCE and HYPERINSULINEMIA; and eventually by GLUCOSE INTOLERANCE; HYPERGLYCEMIA; and overt diabetes. Type II diabetes mellitus is no longer considered a disease exclusively found in adults. Patients seldom develop KETOSIS but often exhibit OBESITY.
Free Diabetes Supplies
Hypertension
Persistently high systemic arterial BLOOD PRESSURE. Based on multiple readings (BLOOD PRESSURE DETERMINATION), hypertension is currently defined as when SYSTOLIC PRESSURE is consistently greater than 140 mm Hg or when DIASTOLIC PRESSURE is consistently 90 mm Hg or more.
Mesothelioma
A tumor derived from mesothelial tissue (peritoneum, pleura, pericardium). It appears as broad sheets of cells, with some regions containing spindle-shaped, sarcoma-like cells and other regions showing adenomatous patterns. Pleural mesotheliomas have been linked to exposure to asbestos. (Dorland, 27th ed)
Osteoarthritis
A progressive, degenerative joint disease, the most common form of arthritis, especially in older persons. The disease is thought to result not from the aging process but from biochemical changes and biomechanical stresses affecting articular cartilage. In the foreign literature it is often called osteoarthrosis deformans.
