An alternate red and white colour-changing rectal carcinoid tumour

A 56-year-old female presented with a 3-month history of iarrhoea and abdominal pain. Colonoscopy examination found a ass (approximately 0.5 × 0.6 × 0.3 cm) in the rectum 5 cm from he anus. The overlying mucosa regularly alternated colour from hite (Fig. 1) to red (Fig. 2) approximately every 10 s. Endoscopic ltrasonography revealed its origin in the submucosa, and rectal arcinoid tumour was suspected. However, an ulcerative lesion was ound in the transverse colon, and was pathologically diagnosed as denocarcinoma. The patient underwent transanal local excision or rectal neoplasm and laparoscopic radical resection of transverse olonic carcinoma in the Department of Surgery. Immunohistohemical results of rectal neoplasm were positive for Syn, CD56, gA, CK and Ki-67 proliferation rate of 2%; thus, rectal carcinoid umour was confirmed. Postoperative course was unremarkable, nd the patient was discharged 3 weeks postoperatively.