Mucous colitis is a malady about the character of which there is much difference of opinion and about the etiology of which there is no agreement. Therefore it can be defined merely as "a chronic condition in which the bowel forms abnormal mucus in large quantities." Not in all cases but in the severer ones it is accompanied by intestinal toxemia and various nervous or psychic phenomena, and to these the difficulties of its proper comprehension may be largely attributed. Though usually associated with constipation, it may exist with diarrhea. At times it may produce abdominal pain or soreness or even intense colic, but the disease in severe form is often present without colic. It occurs in both males and females of all ages, and, though a common cause of invalidism, would seem to be frequently overlooked.
Neither constipation nor intestinal putrefaction nor abdominal pain nor a psychoneurosis tells
WALTER A. BASTEDO. MUCOUS COLITIS. JAMA. 1929;92(8):601–605. doi:10.1001/jama.1929.02700340001001