Giant Submucosal Lipoma of Sigmoid Colon

Lipomas of the gasterointestinal tract are relatively uncommon in clinical practice. most casesare asymptomatic with small tumor size and do not need any special treatment but the large onesare known to cause symptoms such as abdominal pain, obstruction, intussusceptions, and bleeding.the majority (90%) of these lesions are submucosal with predominantly right sided with a slightpreponderance in females. recurrence or malignant transformation has not documented in theselesions. we present a case of giant submucosal lipoma in a 33 years old male in sigmoid colonpresenting with abdominal pain and rectal bleeding from imam hospitals’ complex, tehran-iran.in patients with gastrointestinal symptoms and large mass in sigmoid and with non-specific findingsin colonoscopy, this disease has to be taken into consideration.