<prompt> True regarding crohns disease are AE ?SclerodermaTransmural involvementCobble stone appearanceSkin involvement  <response>: Ans. is a i.e., Scleroderma The skin involvement in Crohns disease causes erythema nodosum, scleroderma does not occur in Crohns disease. Other extra intestinal manifestations of Crohns disease: I. Migratory polyahritis 2. Sacroiliaitis 5. Hepatic pericholangitis 7. Clubbing 3. Ankylosing spondylitis 4. Uveitis 6. Primary sclerosing cholangitis 