RT Journal Article SR Electronic T1 A case of hypogonadotrophic hypogonadism with anosmia (Kallmann's syndrome) in a male, with familial incidence of a small metacentric chromosome (47,XX, mat?+). JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 71 OP 75 DO 10.1136/jmg.13.1.71 VO 13 IS 1 A1 Ventruto, V A1 Cali, A A1 Farina, L A1 Festa, B A1 Ricciardi, I A1 Sebastio, L YR 1976 UL http://jmg.bmj.com/content/13/1/71.abstract AB A case of Kallmann's syndrome in a male is reported. Besides the classical picture of hypogonadotrophic hypogonadism (demonstrated both by endocrine investigation and a testicular biopsy) with anosmia, a number of other unusual features are present including gynaecomastia, agencies of the anterior brachial muscles, some dental abnormalities, and dyschromatopsy. The karyotype, studied on peripheral lymphocytes, shows, in the propositus as well as in his mother, the presence in all mitoses of an extra small metacentric chromosome; its derivation is uncertain.