Handbook of genetic counselingklinefelter syndrome. These patients, together with five xxyy subjects recorded in the literature, show the clinical features of klinefelter s syndrome. While often compared with 47,xxyklinefelter syndrome because of shared features including tall stature and hypergonadotropic hypogonadism. Its seeming rarity may be ascribed to the subtleties of clinical manifestation in a prepubertal boy rather than difficulty in establishing the diagnosis once suspected. An xxyy variant of the klinefelter syndrome in a prepubertal boy is described.
Xxyy syndrome is the name attached to the cluster of symptoms that. Klinefelter syndrome is a genetic condition that results when a boy is born with an extra copy of the x chromosome. Taking into consideration the findings in xyy and xxxyy individuals, it appears that the addition of a y chromosome to xy, xxy and xxxy complexes has a. While often compared with 47, xxy klinefelter syndrome. Xxyy syndrome is the name attached to the cluster of symptoms that arise as a result of the 48, xxyy chromosome pattern. Klinefelter syndrome may adversely affect testicular growth, resulting in smaller than normal testicles, which can lead to. Klinefelter syndrome ks, also known as 47, xxy is the set of symptoms that result from two or more x chromosomes in males. Klinefelter syndrome is a genetic condition affecting males, and it often isnt diagnosed until adulthood. Xxyy syndrome is a sex chromosome anomaly in which males have an extra x and y chromosome. The xxyy variant of klinefelters syndrome ncbi nih. Human cells usually contain two sex chromosomes, one. Individuals with 48, xxyy are usually considerably tall with small testes that do not function normally leading to infertility. Poly xsyndrome, often described in literature as a variant of ks, is much rarely reported with a prevalence of 1. Sometimes, symptoms are more prominent and may include weaker muscles, greater height, poor coordination, less.
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