You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following is true about ulcerative colitis? and explain in detail?
ULCERATIVE COLITIS Major pathologic process involves the mucosa and submucosa of the colon, with sparing of the muscularis. Rectal involvement (proctitis) is the hallmark of the disease, and the diagnosis should be seriously questioned if the rectal mucosa is not affected. Most characteristic lesion of UC : Crypt abscess . Cobble stone mucosa is characterisitc of CD . Pseudo polyps are MC in UC (UC > CD) It is a pre malignant condition .