浅表性平滑肌肉瘤(superficial leiomyosarcoma)包括真皮或真皮内平滑肌肉瘤(dermal or intradermal leiomyosarcoma)、皮下平滑肌肉瘤(subcutaneous leiomyosarcoma)和继发性平滑肌肉瘤(secondary leiomyosarcoma)三种类型[ 9,10 ]。绝大多数的真皮平滑肌肉瘤可能起自于竖毛肌,位于阴茎和睾丸等外生殖区的肿瘤则可能起自于生殖肉膜肌或勃起肌(genital dartoic or erector musc ......