Klinefelter syndrome

Klinefelter syndrome
Chromosomal disorder that occurs in one out of 500 males.

With an extra X chromosome in each cell (XXY), patients look male, with firm, small testes, but they produce no sperm and may have enlarged breasts and buttocks and very long legs. Testosterone is low and pituitary reproductive hormones high. Intelligence is usually normal, but social adjustment can be difficult. Rarer variants cause additional abnormalities, including mental retardation. In the XX male syndrome, Y chromosome material has been transferred to another chromosome, causing changes typical of Klinefelter syndrome. All variants are treated with androgens.

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Look at other dictionaries:

  • Klinefelter syndrome — Klinefelter syndrome. См. синдром Клайнфельтера. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Klinefelter syndrome — A chromosome condition in boys and men that is usually due to their having 47 chromosomes with XXY sex chromosomes, rather than having the usual 46 chromosomes with XY sex chromosomes. XXY is one of the most common chromosomal abnormalities. It… …   Medical dictionary

  • Klinefelter syndrome — A genetic disorder in males caused by having one or more extra X chromosomes. Males with this disorder may have larger than normal breasts, a lack of facial and body hair, a rounded body type, and small testicles. They may learn to speak much… …   English dictionary of cancer terms

  • Klinefelter syndrome — noun syndrome in males that is characterized by small testes and long legs and enlarged breasts and reduced sperm production and mental retardation; a genetic defect in which an extra X chromosome (XXY) is present in the male • Syn: ↑Klinefelter… …   Useful english dictionary

  • Klinefelter syndrome — noun see Klinefelter s syndrome …   New Collegiate Dictionary

  • Klinefelter syndrome — noun A genetic condition in which a male is born with two X chromosome …   Wiktionary

  • Klinefelter syndrome —  Not felter’s. Genetic disease that causes language difficulties …   Bryson’s dictionary for writers and editors

  • Klinefelter syndrome — affecting genitalia and internal ducts, usually male; testes underdeveloped and do not produce sperm …   Eponyms, nicknames, and geographical games

  • chromatin-negative Klinefelter syndrome — chromatin negative Klinefelter syndrome. См. хроматин отрицательный синдром Клайнфельтера. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Klinefelter's syndrome — Infobox Disease ICD10 = ICD10|Q|98|0|q|90 ICD10|Q|98|4|q|90 ICD9 = ICD9|758.7 Caption = 47,XXY ICDO = OMIM = MedlinePlus = eMedicineSubj = ped eMedicineTopic = 1252 MeshID = D007713 Klinefelter s syndrome, 47,XXY or XXY syndrome is a condition… …   Wikipedia

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