Dive into a comprehensive lecture on Crohn's Disease, exploring its etiology, pathophysiology, clinical features, diagnosis, and treatment. Learn about the current theories combining autoimmune, genetic, and environmental factors associated with the condition. Examine the pathophysiology and clinical manifestations in patients with Crohn's Disease, including colonoscopy images and dermatological/optic manifestations. Discover the diagnostic process and explore treatment options based on disease severity classifications. Gain valuable insights into this complex inflammatory bowel disease through detailed explanations, visual aids, and up-to-date medical information.