Case report: a precancerous lesion associated with HPV in the anal canal diagnosed by magnifying endoscopy with narrow-band imaging and resected by endoscopic submucosal dissection
Although anal cancer remains rarely diagnosed in the world, its frequency is rising, especially in high-risk groups.The prognosis of advanced anal cancer is poor.However, there are still few reports on the endoscopic diagnosis and treatment of early anal cancer and its precancerous lesions.A 60-year-old woman was referred to our hospital for endosc