Chen Ning is deputy director and chief physician of the Department of Gastroenterology at Peking University People's Hospital. Chen Ning: Crohn's disease is a chronic, progressive disease whose exact cause is not yet fully understood.
The disease affects the entire digestive tract, from the mouth, esophagus, stomach, to the small intestine, large intestine, and perianal area. The symptoms of Crohn’s disease are varied and complex and share many similarities with other intestinal diseases, making it prone to mis diagnosis.