疾病名称:
高级别子宫内膜间质肉瘤-伴BCOR异位或者片段重复
作者:
曹登峰
英文名称:
High grade endometrial stromal sarcoma with BCOR translocation or internal tandem duplication



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概述:
伴有BCOR基因改变的高级别子宫内膜间质肉瘤, 包括ZC3H7B-BCOR, BCOR-ZC3H7B和BCOR基因内片段重复3种亚型。患者年龄一般年轻 (范围18 至 71岁)。
发病部位:
子宫内膜+/-肌层
诊断要点:

1. 累及子宫内膜和肌层

2. 梭形细胞为主,可伴有少量卵圆形和上皮样细胞,轻度至中度异型,核分裂像范围大 (1-50/10 高倍视野,中位14.5/10 hpfs, 80%的病例超过10/10 hpfs),核染色质细腻

3. 细胞质量不等,从很少到丰富

4. 间质:大多数可见粘液变,偶尔可见胶原斑块

6. 肿瘤凝固性坏死:可见,但是只有少数肿瘤有

7. 脉管瘤栓:多数肿瘤有

图片:

细胞呈梭形至卵圆形,核染色质细腻,核中度异型,可见核分裂像,间质可见粘液变, 本例经FISH检测证实有BCOR基因异位

免疫组织化学染色:
1. CD10 阳性(17/17 BCOR异位,1/3 BCOR内部片段重复) 2. BCOR:(BCOR异位多数阳性, 局部至弥漫强阳性,但是可以阴性;BCOR内部片段重复目前报到的几例均弥漫强阳性) 3. ER和PR: 一般阴性,可以局灶阳性 4. desmin: 可以局灶阳性 5. SMA: 可以局灶阳性 6. H-caldesmon:可以局灶阳性 7. Cyclin D1: 90% 病例弥漫强阳性
分子标记:
FISH 检测 ZC3H7B-BCOR和BCOR-ZC3H7B, PCR检测BCOR内部片段重复
鉴别诊断:

1. 低级别子宫内膜间质肉瘤

2. YWHAE-NUTM2 融合高级别子宫内膜间质肉瘤

3. 粘液性平滑肌肉瘤

4. 炎性肌纤维母细胞瘤

5. 粘液性未分化肉瘤

预后:
比低级别间质肉瘤预后差,好于未分化肉瘤
治疗:
手术, 化疗和放疗
参考文献:

1. Panagopoulos I, Thorsen J, Gorunova L, Haugom L, Bjerkehagen B, Davidson B, Heim S, Micci F. Fusion of the ZC3H7B and BCOR genes in endometrial stromal sarcomas carrying an X;22-translocation. Genes Chromosomes Cancer. 2013 Jul; 52(7):610-8. 

2. Kao YC, Sung YS, Zhang L, Jungbluth AA, Huang SC, Argani P, Agaram NP, Zin A, Alaggio R, Antonescu CR. BCOR Overexpression Is a Highly Sensitive Marker in Round Cell Sarcomas With BCOR Genetic Abnormalities. Am J Surg Pathol. 2016 Dec; 40(12):1670-1678.

3. Hoang LN, Aneja A, Conlon N, Delair DF, Middha S, Benayed R, Hensley ML, Park KJ, Hollmann TJ, Hameed MR, Antonescu CR, Soslow RA, Chiang S. Novel High-grade Endometrial Stromal Sarcoma: A Morphologic Mimicker of Myxoid Leiomyosarcoma. Am J Surg Pathol. 2017 Jan;41(1):12-24.  

4. Chiang S, Lee CH, Stewart CJR, Oliva E, Hoang LN, Ali RH, Hensley ML, Arias-Stella JA 3rd, Frosina D, Jungbluth AA, et al. BCOR is a robust diagnostic immunohistochemical marker of genetically diverse high-grade endometrial stromal sarcoma, including tumors exhibiting variant morphology. Mod Pathol. 2017 Sep; 30(9):1251-1261. 

5. Lewis N, Soslow RA, Delair DF, Park KJ, Murali R, Hollmann TJ, Davidson B, Micci F, Panagopoulos I, Hoang LN, et al. ZC3H7B-BCOR high-grade endometrial stromal sarcomas: a report of 17 cases of a newly defined entity. Mod Pathol. 2018 Apr; 31(4):674-684. 


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