Flat polyps of the sigmoid colon are flat polyps that are present in the sigmoid colon. A polyp is a growth on the surface of the epithelium or mucous membrane and is usually benign. A flat polyp of the sigmoid colon is a term commonly used in colonoscopy reports to describe a polyp that is located in the sigmoid colon (which may be described in detail as the number of centimeters of the sigmoid colon from the anal opening) and is flat in nature. In addition, the size of the polyp should be described in the colonoscopy report, e.g., the size of 0.5 cm in diameter; during the examination, the person taking the test also needs to describe the softness and hardness of the texture and so on. The diagnosis of polyps should be made after the return of the pathologic results to make a final and accurate diagnosis. The patient should consult the doctor for a definitive diagnosis and treatment as prescribed by the doctor.