[Two cases of Kallmann's syndrome]

Herein we report two cases of hypogonadism with anosmia or hyposmia (Kallmann's syndrome), a 23-year-old single man (case 1) and a 34-year-old single man. (case 2). Micropenis and small testes were seen in both cases. Central anosima and central hyposmia were found in cases 1 and 2, respectively. Their karyotypes were normal (46, XY). The plasma levels of LH and FSH were low and the reaction to LH-RH test was poor in both cases. After repetitious LH-RH administrations, a good response of plasma LH was recognized in both cases except for a poor response of plasma FSH in case 1, while plasma testosterone remained low in both cases. Their testicular biopsies revealed immature testes without any developed Sertoli and Leydig cells.