组织学图像较一致，肿瘤表面部分可见宫腔表面黏膜上皮。

Interesting case! Thank you for sharing.

I agree with most opinion here that this is most likely a UTRODCT (Uterine tumor resembling ovarian sex cord tumor). Based on recent studies and progress, this tumor further divided into two groups of tumors: 1. Endometrial stromal tumor with sex cord-like elements (ESTSCLE); 2. UTROSCT.

In ESTSCLE, the sex cord component constitutes a minor portion of an endometrial stromal tumor. In UTROSCT, it is predominant or exclusive component of a uterine wall lesion composed of a variety of mesenchymal elements. Therefore, UTROSCT is pathogenetically more heterogenous. To differentiate this tumor from usual smooth muscle or endometrial stromal tumor, it is important to confirm the sex-cord element. A panell of following 4 immunohistochemical markers is recommended as the most reliable markers for confirming sex cord component: Calretinin, CD99, Inhibin and MelanA. Among them Caretinin is the most sensitive marker. ESTSCLE usually only expresses one maker, mostly calretinin. Calretinin positivity plus any one of three other markers mentioned above may thus confirm the diagnosis of UTROSCT.

There is a good review paper just published on International Journal of Gynecologic Pathology in 2008 by Dr. Czernobilsky. I have the PDF file. If anybody interested in reading this paper, please send me an email and leave your email address to me.

I hope this is helpful to you all.

 本例的初步病理诊断为：类似卵巢性索瘤的子宫肿瘤，本例没有明确的经典的子宫间质肿瘤的成分，几乎全部为性索样分化的组织形态，一般为良性经过。

谢谢各位老师的回复，按照杨斌老师提供的文献将再做一次免疫组化。