Infantile cortical h. corticale infantile a disease of young infants, with soft tissue swelling over affected bones, fever, irritability, and periods of remission and exacerbation. B. veineux a continuous blowing, singing, or humming murmur heard on auscultation over the right jugular vein in the sitting or erect position; it is an innocent sign that is obliterated on assumption of the recumbent position or on exerting pressure over the vein. The energy producing such a sensation; it exists in the form of molecular or atomic vibration and may be transferred, as a result of a gradient in temperature. Mixed h. mixte hearing loss that is both conductive and sensorineural. Hyperfractionation hyperfractionnement a subdivision of a radiation treatment schedule with some reduction of dose per exposure so as to decrease side effects while still delivering an equal or greater total dose of radiation over the course. Chlorinated h. chloré any of a group of toxic compounds used mainly as refrigerants, industrial solvents, and dry cleaning fluids, and formerly as anesthetics. Heat chaleur 1. Suffix with hypn to mean sleep-inducing or non. the sensation of an increase in temperature.
One gene-one polypeptide chain h. hypothèse « un gène-une enzyme » a gene is the DNA sequence that codes for the production of one polypeptide chain. Claw h. griffe cubitale see clawhand. Hyperlipidemia hyperlipidémie elevated concentrations of any or all of the lipids in the plasma, including hypertriglyceridemia, hypercholesterolemia, etc. Hypertrophy hypertrophie enlargement or overgrowth of an organ or part due to increase in size of its constituent cells. Accoutumance an older term denoting sometimes tolerance and sometimes a psychological dependence due to repeated consumption of a drug, with a desire to continue its use, but with little or no tendency to increase the dose. Hip hanche coxa; the region of the body around the joint between the femur and pelvis. The base and its salts, including h. acetate, h. butyrate, h. cypionate, h. probutate, h. sodium phosphate, h. sodium succinate, and h. Suffix with hypn to mean sleep-inducing cancer. valerate are used as replacement therapy in adrenocortical insufficiency and as antiinflammatory and immunosuppressant agents in the treatment of a wide variety of disorders. Heterozygote hétérozygote an individual exhibiting heterozygosity.
Used as a diluent for other gases, particularly with oxygen in the treatment of certain cases of respiratory obstruction, and as a vehicle for general anesthetics. Active h., arterial h. active that due to local or general relaxation of arterioles. Hepatitides Inflammation of the liver. Of pulp c. de la pulpe an extension of the pulp into an accentuation of the roof of the pulp chamber directly under a cusp or lobe of the tooth. 17β-hydroxysteroid dehydrogenase deficiency déficit en 17β-hydroxystéroïde déshydrogénase an autosomal recessive disorder of steroidogenesis due to deficiency of the testicular enzyme testosterone 17β-dehydrogenase (NADP+); characterized by male pseudohermaphroditism with postpubertal virilization and sometimes gynecomastia, decreased plasma testosterone, and increased androstenedione. Convective h. de convection heat conveyed by currents of a warm medium, such as air or water. Oligomeganephronic renal h. rénale oligoméganéphronique oligomeganephronia. The line encircling a tooth in a more or less horizontal plane and passing through the surface point of greatest radius. Suffix with hypn to mean sleep-inducing sleep. Myocardial h. myocardique chronic but potentially reversible cardiac dysfunction caused by chronic myocardial ischemia, persisting at least until blood flow is restored. Adrenocortical h. corticosurrénale 1. any of the corticosteroids elaborated by the adrenal cortex, the major ones being the glucocorticoids and mineralocorticoids, and including some androgens, progesterone, and perhaps estrogens. Neonatal h. néonatale a type with uncertain etiology, occurring soon after birth, marked by prolonged persistent jaundice that may progress to cirrhosis. In cardiac pacemaker terminology, the number of pulses per minute below the programmed pacing rate that the heart must drop in order to cause initiation of pacing. Postcoital h. post-coïtale one occurring during or after sexual activity, usually in males.
Haustra [L. ] a recess or sacculation. Histamine is used as an aid in the diagnosis of asthma and a positive control in skin testing. Fœtale hypoxia in utero, caused by conditions such as inadequate placental function (often abruptio placentae), preeclamptic toxicity, prolapse of the umbilical cord, or complications from anesthetic administration. Alternative h. alternative one that is compared with the null hypothesis in a statistical test. Drop h. ballante wristdrop. Borderline h. labile a condition in which the arterial blood pressure is sometimes within the normotensive range and sometimes within the hypertensive range.
C-cell h. des cellules C a premalignant stage in the development of the familial forms of medullary thyroid carcinoma, characterized by multicentric patches of parafollicular cells (C cells). The hypersensitivity states and resulting reactions are usually subclassified by the Gell and Coombs classification (q. 17α-h. an enzyme that catalyzes the oxidation of steroids at the 17 position, steps in the synthesis of steroid hormones; deficiency causes a form of congenital adrenal hyperplasia and if it occurs during gestation can cause male pseudohermaphroditism. Primary h. is associated with neoplasia or hyperplasia; the excess of parathyroid hormone leads to alteration in function of bone cells, renal tubules, and gastrointestinal mucosa. Heart cœur cor; the viscus of cardiac muscle that maintains the circulation of the blood; see Plate 24. artificial h. artificiel a pumping mechanism that duplicates the rate, output, and blood pressure of the natural heart; it may replace the function of a part or all of the heart. Hemoptysis hémoptysie the spitting of blood or of blood-stained sputum. Thyroid-stimulating h., (TSH) thyrotropic h. de stimulation de la thyroïde thyrotropin. Hyperlysinemia hyperlysinémie 1. excess of lysine in the blood. Hydroxybutyric acid acide hydroxybutyrique any of several hydroxy derivatives of butyric acid; β-h. a. Melanocyte-stimulating h., (MSH) melanophorestimulating h. mélanostimulante one of several peptides secreted by the anterior pituitary in humans and in the rhomboid fossa in lower vertebrates, influencing melanin formation and its deposition in the body. Of Morgagni h. de Morgagni 1. a cystlike remnant of the müllerian duct on the upper end of the testis. Hygienist hygiéniste a specialist in hygiene. Adrenomedullary h's h. de la médullosurrénale, h. médullosurrénales substances secreted by the adrenal medulla, including epinephrine and norepinephrine.
Migraine h. migraineuse migraine. Hair cheveu pilus; a threadlike structure, especially the specialized epidermal structure composed of keratin and developing from a papilla sunk in the dermis, produced only by mammals and characteristic of that group of animals. Any of a group of anticonvulsants containing such a ring structure, including phenytoin and ethotoin. Ectopic h. ectopique one released from a neoplasm or cells outside the usual source of the hormone. Lattice h. du treillis a theory of the nature of the antigen-antibody reaction which postulates reaction between multivalent antigen and divalent antibody to give an antigen-antibody complex of a lattice-like structure. Tactile h. tactile one involving the sense of touch. Hyperchromatisme degeneration of cell nuclei, which become filled with particles of pigment (chromatin).
Enteric h. entérique formation of calcium oxalate calculi in the urinary tract after resection or disease of the ileum, due to excessive absorption of oxalate from the colon. Adrenal h. surrénale that associated with an adrenal tumor which secretes mineralocorticoids. Heterogeneity hétérogénéité the state or quality of being heterogeneous. It is used in diagnosis of mild hyperthyroidism and Graves disease, and in differentiating among primary, secondary, and tertiary hypothyroidism. Hafnia Hafnia a genus of gram-negative facultatively anaerobic, rod-shaped bacteria of the family Enterobacteriaceae. Many abnormal hemoglobins have been reported; the first were given capital letters such as hemoglobin E, H, M, and S, and later ones have been named for the place of discovery. 17α-hydroxyprogesterone; an intermediate formed in the conversion of cholesterol to cortisol, androgens, and estrogens. Capillary h. capillaire 1. the most common type, having closely packed aggregations of capillaries, usually of normal caliber, separated by scant connective stroma. Hyperthermia hyperthermie hyperpyrexia; greatly increased body temperature. Hearing loss perte d'audition deafness; partial or complete loss of the sense of hearing. Its decarboxylation results in formation of histamine. Hypothermal, hypothermic. Double h., Watson-Crick h. double hélice the usual configuration of double-stranded DNA in vivo, being two complementary antiparallel polynucleotide chains coiled into a helix, the sugar-phosphate backbone on the outside and the chains held together by hydrogen bonds between pairs of bases.
Fick h. de Fick a colored circle appearing around a light due to the wearing of contact lenses. Otitic h. otitique that caused by spread of inflammation of otitis media to the cranial cavity. Scrotal h. scrotale inguinal hernia that has passed into the scrotum. Hypotension hypotension abnormally low blood pressure. Hemophilic hémophile 1. having an affinity for blood; in bacteriology, growing well in culture media containing blood or having a nutritional affinity for constituents of fresh blood. Sex h's h. sexuelles the estrogens and androgens considered together. Lactentium hyperemesis lactentium excessive vomiting in nursing babies. Paraduodenal h. paraduodénale an intraabdominal hernia in which the small intestine rotates incompletely during development and becomes trapped in the mesentery of the colon. Artificielle a state of reduced metabolism, muscle relaxation, and a twilight sleep resembling narcosis, produced by controlled inhibition of the sympathetic nervous system and causing attenuation of the homeostatic reactions of the organism. Chronic paroxysmal h. paroxystique chronique a type of one-sided headache resembling a cluster headache but occurring in paroxysms of half an hour or less, several times a day, sometimes for years. Nodular h. of the prostate h. bénigne de la prostate benign prostatic h. sebaceous h. sébacée a type of pale, round lesion consisting of malformed sebaceous glands, usually on the face of an older adult.
Palmoplantar h. palmoplantaire see under keratoderma. Hamartoma hamartome a benign tumorlike nodule composed of an overgrowth of mature cells and tissues normally present in the affected part, but with disorganization and often with one element predominating. Congruous h. congruente that in which the defect is approximately the same in each eye. LH-RH) lutéolibérine a glycoprotein gonadotropic hormone of the adenohypophysis that acts with follicle-stimulating hormone to promote ovulation and promotes secretion of androgen and progesterone. Subdural h. sous-dural a massive blood clot beneath the dura mater that causes neurologic symptoms by pressure on the brain. Hiatal h., hiatus h. hiatale protrusion of any structure through the esophageal hiatus of the diaphragm. Accidental h. accidentel one that accidentally harbors an organism that is not ordinarily parasitic in the particular species. Zoster zona shingles; an acute, unilateral, self-limited inflammatory disease of cerebral ganglia and the ganglia of posterior nerve roots and peripheral nerves in a segmented distribution, believed to represent activation of latent human herpesvirus 3 in those who have been rendered partially immune after a previous attack of chickenpox, and characterized by groups of small vesicles in the cutaneous areas along the course of affected nerves, and associated with neuralgic pain. Fibroid h. fibroïde one in which fibrous tissue replaces portions of the myocardium, such as may occur in chronic myocarditis. Hysteria hystérie a term formerly used widely in psychiatry. Hémangiome 1. a red, firm, dome-shaped hemangioma seen at birth or soon after, usually on the head or neck, that grows rapidly and usually regresses and involutes without scarring.