SMN1 and neoplasm: The tumor on immunohistochemistry showed that the lesions were positive for human melanin black-45 (HMB-45) (Fig. 2B), smooth muscle actin (SMA) (Fig. 2C), CD99, vimentin, and CD34, but the CD117, S100, CK, CK18, and Ki-67 immunohistochemistry outcomes were negative.