(n.) Absence or closure of a natural passage or channel of the body; imperforation.
Example Sentences:
(1) The condition is compared to extrahepatic and intrahepatic biliary atresia of man and evidence is presented for regarding this case to be one of extrahepatic origin.
(2) Four cases of pregnancies in two women with tricuspid atresia (TA) are described.
(3) An experimental model was established in the ewe allowing one to predict with accuracy an antral follicle that coincidentally would either undergo ovulation (6-8 mm diameter) or atresia (3-4 mm diameter) following synchronization of luteal regression and the onset of the gonadotropin surge.
(4) Experience in managing 160 patients with tricuspid atresia is reviewed.
(5) The mean birth weight and gestational age in jejunal atresia were significantly lower than in ileal atresia.
(6) A case of low atresia of the ileum, diagnosed prenatally by real-time ultrasound scanning, is presented.
(7) Six had a univentricular heart of left ventricular morphology, three had a single ventricle of right ventricular morphology, one had tricuspid atresia with transposition of the great arteries, one had pulmonary atresia, intact ventricular septum, and hypoplastic right ventricle, and one had corrected transposition with hypoplastic systemic ventricle.
(8) In the first case, characterized by dextrocardia, the interventricular septum was intact, while in the second case with levocardia, a high ventricular septal defect was associated with pulmonary atresia.
(9) By contrast, during follicular atresia, granulosa cells continue to synthesize delta 4, but their capacity to synthesize estrogen is substantially reduced.
(10) Fourteen patients with double inlet left ventricle and nine patients with tricuspid atresia had biplane left ventricular angiography with simultaneous measurement of left ventricular pressure by micromanometer.
(11) A case report of uterovaginal hypoplasia in association with anal atresia and recto-vaginal fistula is presented, and the value of ultrasound in the diagnosis of this entity is discussed.
(12) Literature review showed this to be the first reported case of sigmoid sinus thrombosis in congenital aural atresia.
(13) This syndrome with multiple atresias in small and large bowel and intestinal calcification is an entity of probably autosomal recessive inheritance.
(14) As more patients have been evaluated abnormal increases have been found in other defects, such as omphalocele, duodenal atresia, and congenital nephrosis.
(15) In contrast to adults, infants can suffer from intrahepatic biliary atresias and from alpha-1-antitrypsin-deficiency.
(16) Preduodenal portal vein is a rare anatomical variant which may be one of many anomalies in the neonate with duodenal "atresia."
(17) The diagnosis of aortic atresia was made prior to death by right heart catheterization with angiocardiography and this was confirmed at autopsy.
(18) Their use is indicated in large or total defects to restore the natural anatomical conical shape of the eardrum, particularly in congenital atresia.
(19) The second, less common type of steal is associated with isolated atresia of the proximal segment of the subclavian arteries.
(20) Fourteen of the 27 individuals with pulmonary atresia, ventricular septal defect, and hypoplastic confluent pulmonary arteries had adequate angiographic follow-up, which demonstrated significant pulmonary artery enlargement.
Involution
Definition:
(n.) The act of involving or infolding.
(n.) The state of being entangled or involved; complication; entanglement.
(n.) That in which anything is involved, folded, or wrapped; envelope.
(n.) The insertion of one or more clauses between the subject and the verb, in a way that involves or complicates the construction.
(n.) The act or process of raising a quantity to any power assigned; the multiplication of a quantity into itself a given number of times; -- the reverse of evolution.
(n.) The relation which exists between three or more sets of points, a.a', b.b', c.c', so related to a point O on the line, that the product Oa.Oa' = Ob.Ob' = Oc.Oc' is constant. Sets of lines or surfaces possessing corresponding properties may be in involution.
(n.) The return of an enlarged part or organ to its normal size, as of the uterus after pregnancy.
Example Sentences:
(1) Here we report direct measurements of protein kinase C (PKC) activity in uninduced ectoderm, and in neuroectoderm shortly after induction by the involuting mesoderm, in Xenopus laevis embryos.
(2) The most common type of osteoporosis is involutional, and two subtypes are recognized: type 1 and type 2.
(3) The involution of crown odontoblasts after primary dentinogenesis in teeth of limited eruption is discussed.
(4) The treatment of hemangiomas with X-rays has been sharply criticized because of their tendency to involute spontaneously.
(5) Glands with only slight involution and containing numerous germinal centres were more commonly seen in young female patients.
(6) In conclusion, the association of T4 and iodide seems to be the best way to obtain a rapid and complete involution of thyroid hyperplasia.
(7) Less amount of parenchyma and growth of the stroma in baboons and a greater mitotic complex in rhesus monkeys show more pronounced involution processes in baboons.
(8) Further, CPA is unable to stimulate proliferation or restore the function of the involuted rat prostate.
(9) The MI response was however depressed in both age groups, and the thymus and bursa were involuted.
(10) It is concluded that the acute involution of the thymus in children with non-infectious and acute infectious diseases results in the progressive decrease of the production by the thymus of the immunomodulating polypeptides (thymic hormones) which is restored in the period of recovery.
(11) The involution progress of the tonsil is a shift from immature B- and T cell forms to matured differentiation stages.
(12) The interpretation of aspiration cytologic smears that contain a predominance of follicular components often presents a dilemma to the clinician who is treating a patient who has a dominant thyroid nodule, especially when thyroid-stimulating hormone suppression does not produce any significant involution of the dominant nodule.
(13) The time-courses of the biochemical and histopathological responses suggest that the lipid peroxidation may be an end-result, rather than a cause, of thymic involution and injury to thymic lymphocytes in nickel-treated rats.
(14) We conjecture that postmenopausal and involutional osteoporosis were far advanced before the development of acromegaly, explaining the coexistence of the two conditions.
(15) The myoepithelium of developing, lactating, and involuting mammary gland of the mouse exhibits a high alkaline phosphatase activity.
(16) Both the post-partum involution of the rat uterus and the rapid breakdown of collagen that accompanies it are extensively inhibited by oestrogenic hormones.
(17) These preparations revealed a failure of head involution and the loss or disruption of several head structures, including the salivary glands and the H-piece and ventral arm of the cephalopharyngeal apparatus.
(18) Thereafter, involution still continued and equal diameters for the horns were not found until 5 weeks after parturition.
(19) The enzymes glucose 6-phosphate dehydrogenase, 6-phosphogluconate dehydrogenase, phosphoglucomutase, UDP-glucose pyrophosphorylase, phosphofructokinase, ATP-citrate lyase and acetyl-CoA carboxylase have been assayed in rat mammary glands in various stages of involution after hypophysectomy and weaning.
(20) A total of 101 patients suffering from slowly progressive schizophrenia with hypochondriac symptomatology and a manifestation or a relapse of the disease in the involutional age have been studied.