İ
~colitis
+colitis.
+infectious colitis.
+pseudomembranous colitis.
+radiation colitis.
+ischemic colitis.
+microscopic colitis.
+lymphocytic colitis.
+collagenous colitis.
+diversion colitis.
+self-limited colitis.
+focal active colitis.
+inflammatory bowel disease.
+ulcerative colitis.
+Crohn's colitis.
+colitis.
infectious colitis.
acute onset.
short duration.
fever.
diarrhea.
crypt abscesses.
goblet cell depletion.
amebic colitis.
amebic colitis.
trophozooites.
Entamoeba histolytica.
typical organisms: 40µm, abundant pink cytoplasm.
ingested erythrocytes.
amebic colitis.
focal ulceration.
patchy ulcers.
cecum.
appendix.
rectosigmoid.
pseudomembranous colitis.
recent antibiotic administration.
diarrhea.
abdominal pain.
pseudomembranes on endoscopy.
radiation colitis.
> 45,000 rads to colon.
acute or chronic inflammation.
diarrhea.
abdominal pain.
dusky mucosa endoscopically.
edema endoscopically.
loss of superficial vascularity endoscopically.
acute phase radiation colitis.
edema.
vascular dilatation.
acute cryptitis.
superficial ulceration.
chronic phase radiation colitis.
stromal fibrosis.
atypical fibroblasts.
thickened subepithelial collagen.
glandular atrophy.
glandular distortion.
vascular fibrosis.
vascular intimal thickening.
enlarged endothelial cells.
ischemic colitis.
elderly patient.
acute onset.
diarrhea.
abdominal pain.
nausea.
vomiting.
hematochezia.
mild ischemic colitis.
superficial hemorrhage.
patchy mucosal necrosis.
dilated vasculature.
regenerating crypts.
severe ischemic colitis.
crypt dropout.
acute inflammation.
acute cryptitis.
coagulative necrosis.
late ischemic colitis.
granulation tissue.
scarring.
microscopic colitis.
microscopic colitis.
watery diarrhea.
normal colonoscopy.
usually ♀.
microscopic colitis.
lymphocytic colitis.
increased chronic inflammation in lamina propria.
>20 intraepithelial lymphocytes per 100 enterocytes.
collagenous colitis.
thickened subepithelial collagen.
feathery strands of collogen between glands.
Paneth cell metaplasia.
mixed inflammation, lamina propria.
patchy denuded epithelium.
naked lamina propria.
diversion colitis.
colon excluded from fecal stream.
prominent lymphoid aggregates.
neutrophils, rare crypt abscess.
normal crypt architecture.
self-limited colitis.
self-limited colitis.
self-limited, short-lived clinical course.
sudden onset, diarrhea, abdominal pain.
self-limited colitis.
acute phase self-limited colitis.
lamina propria hemorrhage, congestion.
detached, necrotic surface epithelium.
prominent acute inflammation, > chronic inflammation.
no crypt distortion.
chronic phase self-limited colitis.
lamina propria fibrosis.
crypt distortion.
focal active colitis.
patchy neutrophilic infiltrates.
without glandular distortion.
without crypt abscesses.
inflammatory bowel disease.
inflammatory bowel disease.
mixed inflammation of lamina propria.
plasma cells reaching to muscularis mucosae.
glandular mucus depletion.
occasional Paneth cell metaplasia.
inflammatory bowel disease.
ulcerative colitis.
dense lymphoplasmacytic and neutrophilic infiltrate.
typically infiltrate limited to mucosa.
typically involves rectum, without skip lesions.
may involve entire colon = pancolitis.
may spill into ileum = backwash ileitis.
irregular areas of ulceration.
surrounding islands of preserved mucosa = pseudopolyps.
normal serosa.
Crohn's colitis.
fissuring.
penetrate muscularis propria.
serosal involvement.
acute inflammation.
granulomas.
patchy transmural chronic inflammation.
intervening normal areas = skip lesions.