成人梭形细胞横纹肌肉瘤9例临床病理学分析

目的探讨成人梭形细胞横纹肌肉瘤(spindle cell rhabdom yosarcoma,SRMS)的临床病理学特征、免疫表型和鉴别诊断。方法回顾性分析9例成人SRMS的临床资料、病理学形态和免疫组织化学标记结果。结果9例患者中7例男性,2例女性。年龄20～80岁,平均45岁。发生于头颈部4例,包括右下颌、咽部、鼻咽部和左上颌,占总数的44%。前臂、腰部、大腿、小腿、睾丸分别1例。均表现为逐渐增大的肿块。肿块直径2～14cm,平均5.9cm。组织学上主要由具有轻度非典型性的梭形细胞组成,呈交叉的束状排列,散在于梭形细胞之间有少量的梭形或多角形的横纹肌母细胞。在2例局灶区域可见明显的间质硬化,2例局灶区域可见假血管瘤样结构,1例散在少量疏松黏液样区域,在1例可见局灶区域瘤细胞呈轻度的多形性,但不见奇异核的横纹肌母细胞。免疫组织化学标记显示,梭形细胞表达vimentin、desmin、CD99和MyoD1,多数表达myogenin和MSA(分别为6例和7例),均不表达S-100、CD34、CK和HMB-45。术后随访6个月～4年,发生于睾丸患者有腹腔静脉旁转移,发生于小腿者有肝转移。4例复发,2例死亡。结论成人SRMS少见,好发于男性,头颈部是最好发部位,具有较强的侵袭性行为。形态学上应与多种梭形细胞肿瘤相鉴别。

Spindle cell rhabdomyosarcoma in adults:a clinicopathologic study of nine cases

Purpose To study the clinicopathological features,immunophenotype and differential diagnosis of spindle cell rhabdomyosarcoma in adults (SRMS).Methods The clinical,pathologic and immunohistochemical features were evaluated in 9 cases of SRMS in adults.Results Nine cases of SRMS in adults were retrieved from the pathological archive of this hospital.7 cases were male and 2 were female.Patients age ranged from 20 to 80 years (median,45 years).The head and neck region,including the right mandible,pharyngeal po...