Fig. 3From: Resection of rectal cancer resembling submucosal tumor that was preoperatively diagnosed with endoscopic ultrasound-guided biopsy a Colonoscopy also showed extrinsic compression of rectum, but no change in rectal mucosa. b Endoscopic ultrasound (EUS) showed a 30-mm low echoic lesion originating from rectum. Immunohistochemical staining of biopsy specimen obtained by EUS-FNAB showed that tumor was positive for both (c) CK20 and (d) CDX2Back to article page