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由于横纹肌肉瘤（ｒｈａｂｄｏｍｙｏｓａｒｃｏｍａ，ＲＭＳ）组织形态表现的多样性和不典型性，常使低分化ＲＭＳ的诊断有一定困难。以肌红蛋白（Ｍｂ）为横纹肌源性肿瘤的特异性标志以来，用免疫组化染色检测瘤细胞内Ｍｂ就成为辅助诊断ＲＭＳ的重要方法［１］。但这种检测
Due to the diversity and atypicality of histological manifestations of rhabdomyosarcoma (RMS), it is often difficult to diagnose poorly differentiated RMS. Since myoglobin (Mb) is a specific marker of striated muscle-derived tumors, detection of Mb in tumor cells by immunohistochemistry has become an important method for the diagnosis of RMS [1]. But this detection