中文摘要：

目的：提高对原发性腹膜后精原细胞瘤的认识。方法：本院报道1例原发性腹膜后精原细胞瘤,患者行手术切除,术后组织病理学证实,术后行4周期EP方案辅助化疗。结合文献对原发性性腺外精原细胞瘤的临床表现、病理特点、诊断要点、治疗原则等进行讨论。结果：术后随访7个月,未见明显复发转移。结论：原发性腹膜后精原细胞瘤少见,容易误诊,组织病理检查对该病诊断、治疗方案的选择有重要价值。治疗上尽量完整手术切除,并配合放化疗,该病预后较好。

英文摘要：

Objective： To improve the knowledge of primary retroperitoneal seminoma. Methods： One patient proved by histopathologywas reported in this article. He received surgical operation and four cycles of the EP regimen therapy. Results： He was alive without recurrence and metastasis after 7 months＇ follow up. The histogenesis,clinical features,principle of treatment of primaryretroperitoneal seminoma were discussed with review of literature. Conclusion： Primary retroperitoneal seminoma israre,and the histopathology is very important fordiagnosis and selection of therapy. Surgical resection combined with chemoradiotherapy should be the first choice. The prognosis is good.