Sclerosing Rhabdomyosarcoma,SRMS
夏成青 赵明 刘正智
更新时间:2020-01-08 09:56:00
发病部位:四肢、头颈部、骶骨、阴囊、腹膜后
诊断要点:
2.镜下在大量嗜酸性至嗜碱性的玻璃样或透明变性的基质背景上,可见呈束状、梁状、索状、列兵状、微小腺泡状、管状或实性的小巢状、叶状分布的肿瘤细胞;
3.肿瘤细胞较为原始,小至中等大,呈圆形、多边形或梭形细胞,胞质多少不等,嗜酸性,核形不规则,核深染或呈空泡状,部分病例可见小核仁,核分裂像多见;
4.少数病例可见具横纹的带状横纹肌母细胞或蜘蛛样横纹肌母细胞;
5.局灶区可见梭形细胞横纹肌肉瘤的组织学形态。
免疫组织化学染色:
分子标记:
鉴别诊断:
2.骨外软骨肉瘤:常可见到软骨陷窝和软骨母细胞,后者强阳性表达S-1 00蛋白。
3.硬化性上皮样纤维肉瘤:由中等大的圆形、卵圆形或多边形上皮样细胞组成,胞质常呈透亮状,MUC4阳性,MyoD1、myogenin、MSA阴性。
4.神经源性肿瘤:S-100核及胞质阳性,MyoD 1、myogenin、MSA、desmin等阴性。
预后:
治疗:
参考文献:
Alaggio R , Zhang L , Sung Y S , et al. A Molecular Study of Pediatric Spindle and Sclerosing Rhabdomyosarcoma: Identification of Novel and Recurrent VGLL2-related Fusions in Infantile Cases.[J]. American Journal of Surgical Pathology, 2016, 40(2):224-235.
Wang J , Tu X , Sheng W . Sclerosing Rhabdomyosarcoma: A Clinicopathologic and Immunohistochemical Study of Five Cases[J]. American Journal of Clinical Pathology, 2008, 129(3):410-415.
Folpe AL, McKenney JK, Bridge JA, et al. Sclerosing rhabdomyosarcoma in adults: report of four cases of a hyalinizing, matrix-rich variant of rhabdomyosarcoma that may be confused with osteosarcoma, chondrosarcoma, or angiosarcoma. Am J Surg Pathol. 2002;26:1175-1183
Agaram NP, LaQuaglia MP, Alaggio R, et al. MYOD1-mutant spindle cell and sclerosing rhabdomyosarcoma: an aggressive subtype irrespective of age. A reappraisal for molecular classification and risk stratification. Mod Pathol 2018.