The underlying reason for this remains unclear Inflammatory bowel disease, ulcerative colitis or Crohn colitis
and malignancy (about one to five percent) may be associated with cutaneous vasculitis, too.
Membranous bronchiole characterized by multiple small granulomata in the airway wall in a patient with Crohn colitis
(hematoxylineosin, original magnification X80).
Although there are no randomized clinical trials showing benefit of surveillance in Crohn colitis
, surveillance colonoscopy is recommended by many groups, usually for CD involving more than 1 segment of the colon and/or at least one-third of the colon.
Crohn disease AGA recommendations: * Surveillance for UC also applies for Crohn colitis
. ACG recommendations: * Insufficient evidence to provide guidelines for surveillance.
(59) Pathologists should be cautious about making the diagnosis of sigmoid Crohn colitis
in the context of diverticulitis unless there is CD in other parts of the bowel.