Fig. 4From: Leiomyosarcoma of the transverse colon with lymph node metastasis and malignant transformation: a case reportColorectal endoscopy findings. a A torose lesion was found on the left side of the transverse colon (located 50 cm from the anal verge). b The tumor surface was covered with necrotic tissue and biopsy was performed from the exposed areaBack to article page