A class of chronic diarrhea with a 97% misdiagnosis rate. In mid-December 2012, I spoke about this at a conference on the topic of enteropathy in Jiangsu, and several times since then at several hospitals: The Emperor’s New Clothes – a special type of enteritis that is lymphocytic colitis and collagenous colitis! The problem is that many gastroenterologists are not yet familiar with this disease! In the absence of a good clinicopathological basis, it is really difficult to present the need for observation to a pathologist. Currently. Our Gastroenterology Center Complex Enteropathy team offers HE pathology and immunohistochemical diagnosis for lymphocytic colitis and collagenous colitis. Chronic diarrhea from all over the country with years of undiagnosed and ineffective treatment has been diagnosed and effectively treated! It is also necessary to explain that patients have had diarrhea for many years, but every time there is no obvious finding in the colonoscopy, doctors keep diagnosing “chronic enteritis”, and some are diagnosed as “irritable bowel syndrome”. In fact, it is not, and the treatment is very different! So far, patients from Zhejiang, Anhui, Shanghai, Jiangsu, Zhejiang, Sichuan, Hunan, Henan and other places have been diagnosed and treated thoroughly. All patients must undergo a detailed pre- and post-treatment evaluation and must have pathological findings. Our team has become the department and physician with the largest number of systematically diagnosed and treated microscopic colitis in China.