UNLABELLED Sex chromosome tetrasomy and pentasomy conditions occur in 1:18,000-1:100,000 male births. While often compared with 47,XXY/Klinefelter syndrome because of shared features including tall stature and hypergonadotropic hypogonadism, 48,XXYY, 48,XXXY and 49,XXXXY syndromes are associated with additional physical findings, congenital malformations, medical problems and psychological feat...

The hypothalamic hormone kisspeptin (metastin) regulates human reproduction by modulating gonadotropin-releasing hormone (GnRH) secretion. Kisspeptin is detected in peripheral blood, although GnRH is not. In this study, we measured plasma kisspeptin levels in four male cases with hypogonadism and seven normal male controls using enzyme immunoassay (EIA) to elucidate the clinical implications of...

Federal University of São Paulo (UNIFESP), São Paulo SP, Brazil: Department of Neurology and Neurosurgery; Department of Endocrinology; Department of Ophthalmology. The association between cerebellar ataxia and hypogonadism was first described by Gordon Holmes in 1907. It represents a highly heterogenous syndrome with insidious onset. The hypogonadism of most patients with Gordon Holmes syndrom...

Alstrom syndrome is an autosomal recessive multisystem disorder caused by mutation in ALMS1 (2p13). Very few cases of same are reported so far of same. We report a case of Alstrom syndrome (AS) who presented with type II diabetes mellitus and portal hypertension. Unilateral anorchia with hypergonadotropic hypogonadism is another unique feature of our case.

A 33-year-old male presented to the Chiba University Hospital with the main complaint of right flank pain. Bilateral vas deferens were not palpable. Hormonal examination revealed hypergonadotropic hypogonadism and cytogenetic studies a 47,XXY karyotype. The significance of the association of this karyotype with the absence of vas deferens is discussed.

We present the first reported case of juvenile Systemic Lupus Erythematosus with Klinefelter's syndrome in a 14-year-old Iranian boy who had leg ulcers and arthritis. He had low level of testosterone accompanied with hypergonadotropic hypogonadism. This case emphasizes the importance of two X chromosomes as a risk factor for Systemic Lupus Erythematosus in women and men with Klinefelter's syndr...