生殖细胞肿瘤多见于性腺,发生在性腺外者少见。临床容易误诊,现报告1例如下。患者男性,49岁,因上腹部肿块4个月,于1985年9月在当地医院行剖腹探查。见肿块位于腹膜后,因肿块固定,仅做活检,病理报告“后腹膜恶性纤维组织细胞瘤可能”。2月后又在某院行第二次剖腹探查,发现肠系膜根部肿块约10×15×20 Germ cell tumors more common in the gonads, gonads occur in rare outsiders. Clinically easy to misdiagnosis, the report is as follows. Male, 49 years old, was diagnosed with a laparotomy in a local hospital in September 1985 for 4 months because of the mass of the upper abdomen. See the mass located in the retroperitoneal, due to mass fixation, biopsy only, pathological report “retroperitoneal malignant fibrous histiocytoma may.” 2 months later in a hospital for the second laparotomy and found that the mesentery root mass about 10 × 15 × 20