Kumar Yashwant, Bhatia Alka, Kumar Vijay, Vaiphei Kim
Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
Int J Surg Pathol. 2007 Apr;15(2):204-6. doi: 10.1177/1066896906295776.
Yolk sac tumor (endodermal sinus tumor) is a malignant germ cell tumor that usually arises in the gonads. Extragonadal germ cell tumors are rare and have been described in case reports. We report a pure intrarenal yolk sac tumor in a 1-year-old boy who presented with a huge abdominal mass and was operated for suspected Wilms tumor. The tumor exhibited histopathologic and immunohistochemical features identical to those of an endodermal sinus tumor of gonadal origin. The purpose of this report is to add a rare tumor to the differential diagnosis of pediatric renal neoplasms.
卵黄囊瘤（内胚窦瘤）是一种通常起源于性腺的恶性生殖细胞肿瘤。性腺外生殖细胞肿瘤罕见，已有病例报告描述。我们报告一例1岁男孩的单纯肾内卵黄囊瘤，该患儿表现为巨大腹部肿块，因疑似肾母细胞瘤接受手术。肿瘤的组织病理学和免疫组化特征与性腺起源的内胚窦瘤相同。本报告的目的是在小儿肾肿瘤的鉴别诊断中增加一种罕见肿瘤。
