31歳時と41歳時に精子採取可能であったクラインフェルター症候群の1例

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We report a case of Klinefelter syndrome with the chief complaint of male infertility. Normal pregnancy and delivery resulting from conventional testicular sperm extraction (TESE) and intracytoplasmic sperm injection (ICSI) waspos sible by a previousdoctor when he was31 yearsold. He wasreferred to our hospital for treatment of infertility when he was 41 years old. Abdominal ultrasonography demonstrated a low echoic region with a relatively uniform content in the left testis and a central low echoic small mass surrounded by a high echoic region in the right testis. In excised tissue of the left testis, only a single seminiferous tubule containing spermatozoa was found and sperm was successfully retrieved by microdissection TESE.