<prompt> True regarding crohns disease are AE ?SclerodermaTransmural involvementCobble stone appearanceSkin involvement  <response>: Ans. is a i.e., Scleroderma o The skin involvement in Crohns disease causes erythema nodosum, scleroderma does not occur in Crohns disease. o Other extra intestinal manifestations of Crohns disease: 1. Migratory polyahritis 4. Sacroiliaitis 7. Ankylosing spondylitis 2. Uveitis 5. Hepatic pericholangitis 8. Primary sclerosing cholangitis 