小肠肿瘤不常见。良性肿瘤包括平滑肌瘤、纤维瘤、神经纤维瘤和脂肪瘤。图示回盲瓣部见浅黄*色的肿块，属类癌。虽然，良性肿瘤很少大到阻塞肠腔，但很多有黏膜下层破坏。
Neoplasms of the small intestine are uncommon. Benign tumors can include leiomyomas, fibromas, neurofibromas, and lipomas. Seen here at the ileocecal valve is another tumor that has a faint yellowish color. This is a carcinoid tumor. Most benign tumors are incidental submucosal lesions, though rarely they can be large enough to obstruct the lumen.
