卵巢硬化性间质瘤（sclerosingstromaltumorofovary）是一种较罕见的良性肿瘤，多见于中青年女性，发生于幼儿者国内外文献中则未见报告。由于人们对其认识较晚，加之本瘤独特的病理组织学改变，极易造成误诊。本文报道1例。1临床资料患儿女性，5岁。发现下腹部肿物20余天，行 Ovarian sclerosing stromal tumors (sclerosingstromal tumor of ovary) is a relatively rare benign tumor, more common in young women, occurred in young children at home and abroad have not been reported in the literature. Because people know it later, combined with the unique histological changes of the tumor, can easily lead to misdiagnosis. This article reports a case. 1 Clinical data Children, 5 years old. Found lower abdominal tumor more than 20 days, OK