Tubular adenoma is a type of benign tumor that typically forms in the colon or rectum. It is characterized by gland-like structures and is considered a precancerous lesion, meaning it has the potential to develop into colorectal cancer if left untreated. These tumors are usually small and may not cause any symptoms. Diagnosis of tubular adenoma is often made through colonoscopy, a procedure that allows doctors to examine the inner lining of the intestine. If detected, treatment usually involves the removal of the adenoma during the procedure. Regular screening is important for early detection and prevention of potential complications.