A prospective, single-center, single-blind, randomized controlled study to evaluate the clinical value of transparent cap-assisted second examination of the sigmoid colon for improving colorectal adenoma detection rates
aged 45-75 years
Patients scheduled for therapeutic colonoscopy as postoperative surveillance after colorectal surgery, post-polypectomy follow-up, or treatment of histologically confirmed polyps
Patients with highly suspected or pathologically confirmed colorectal cancer
Patients presenting with alarm symptoms or signs (hematochezia, melena, unexplained anemia or weight loss, palpable abdominal mass, or a positive digital rectal examination)
Pregnant or breastfeeding women