Crypt abscess is more typical of ulcerative colitis. A crypt abscess is something noted with a biopsy, when looked at through a microscope.
Abscesses: Crypt vs. “Regular”
- Crypt abscesses: Crypts, or crypts of Lieberkühn, are mucosal crevices that are seen in the normal gastrointestinal tract. In ulcerative colitis, these get plugged up with living and dead neutrophils, forming “crypt abscesses.” They're microscopic abscesses. These are not “real” abscesses and do not require surgical drainage.
- “Regular” abscesses: Real abscesses are seen predominantly in Crohn’s disease. These are the kind that do not respond well to antibiotics alone and often require surgical drainage. They're large.
A patchy appearance is typical of Crohn's disease. (This is the only Crohn's-like thing you mentioned)
Ulcerative colitis always starts at the rectum. Crohn's often starts where the large intestine meets the small intestine.
Granularity indicates that the surface of mucosa shows unevenness and irregularity, and the degree varies in terms of fineness or roughness. Yours was moderate. It's typical of IBD inflammation and not more predominant one or the other type.