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Crohn�s:
fold thickening, wall thickening, nodular pattern (cobblestone), string sign, aphthoid ulcers, filiform polyps, sinus tracts and fistulas, mesenteric fat stranding, creeping fat, lymphadenopathy, separated bowel loop (omega sign), pseudosacculations, strictures, asymmetric, skip lesions
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UC:
ahaustral, granular mucosa, filiform polyps, starts in rectum, continuous spread, backwash ileitis, crypt abscesses, strictures (worrisome)
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Mass lesions:
normal lymphofollicular pattern, pneumatosis coli, colitis cystica profunda, amyloid, endometriosis, ischemic colitis, polyps, polyposis syndromes, lipoma, leiomyoma, hemangioma, villous adenoma, adenocarcinoma, mets, lymphoma, hemorrhoids
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Polypoid filling defects: polyps �
hyperplastic (#1), adenomatous (#2), hamartomatous, post-inflammatory;
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Polypoid filling defects polyposis �
FAP, Peutz-Jeghers, juvenile polyposis, Turcot, Cronkhite-Canada, Cowden; lymphoma; pneumatosis
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Carpet lesion:
villous adenoma, adenoCA, polyposis, endometriosis, varices
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Colonic urticaria:
herpes, Yersinia, allergy, Crohn�s, ischemia
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Aphthoid ulcers:
Crohn�s, amebiasis, Behcet�s, CMV, herpes, TB, Yersinia (TI)
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Deep ulcers:
UC, Crohn�s, Behcet�s, infectious (amebiasis, TB, Salmonella, Shigella, histo, Candida, herpes, CMV), ischemic colitis, radiation
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Bowel wall thickening (thumbprinting): hemorrhage �
ischemia, Henoch-Schonlein purpura, hemophilia, anticoagulation;
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Bowel wall thickening (thumbprinting): tumor �
lymphoma, leukemia;
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Bowel wall thickening (thumbprinting): edema �
infectious (pseudomembranous colitis, CMV, E Coli, Salmonella, Shigella, amebiasis, typhlitis), IBD
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Circumferential (apple core) or asymmetric narrowing: tumor �
adenocarcinoma, serosal mets (stomach, ovarian, colon, pancreas);
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Circumferential (apple core) or asymmetric narrowing: inflammation �
diverticulitis, IBD, TB, amebiasis;
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Circumferential (apple core) or asymmetric narrowing: other �
endometriosis, pelvic abscess, epiploic appendagitis;
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Circumferential (apple core) or asymmetric narrowing: multifocal �
lymphoma, serosal mets, TB, amebiasis, Crohn�s, endometriosis
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Long segment narrowing:
scirrhous adenocarcinoma, lymphoma, UC, Crohn�s, ischemic stricture, radiation
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Ahaustral colon:
cathartic abuse (usu R colon), UC, Crohn�s, amebiasis, aging (usu L colon), scleroderma, radiation, prior ischemia
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Pseudosacculations:
Crohn�s, scleroderma, ischemia
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Obstruction:
CA, diverticulitis, volvulus, impaction, hernia
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Megacolon: toxic megacolon �
pseudomembranous colitis, UC, Crohn�s, amebiasis;
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Megacolon: acute distension �
obstructive CA, ileus, volvulus;
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Megacolon: chronic �
laxative abuse, Ogilvie syndrome, congenital Hirschsprung�s, Chagas, neuromuscular disorders (Parkinson, DM, scleroderma, amyloid), hypothyroid
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Adult intussusception:
usu ileoileal; tumors � polyps, lipoma, mets, lymphoma, carcinoid; idiopathic, Meckel�s diverticulum, feeding tube; no lead point consider sprue, scleroderma, Whipple�s
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Pneumatosis coli: pneumatosis cystoides �
COPD, asthma, CF, iatrogenic, CVD, steroids;
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Pneumatosis coli: pneumatosis intestinalis �
infarcted bowel, NEC, toxic megacolon, typhlitis
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Coned cecum:
Crohn�s, lymphoma, mets, TB, amebiasis, typhlitis
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Ileocecal deformities:
Crohn�s, UC, amebiasis (spares TI), TB, typhlitis, lymphoma, adenocarcinoma, carcinoid, intussusceptions
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Enlarged ileocecal valve:
>3cm; lipomatous infiltration (#1), lipoma, Crohn�s, lymphoma, prolapsing ileal neoplasms
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Cecal filling defect and nonfilling appendix:
carcinoid, appendicitis, appendix stump, mucocele
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Fat containing mass adjacent to colon:
epiploic appendagitis, omental infarction
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Proctitis:
Condyloma acuminata, lymphogranuloma venereum, GC, UC, Crohn�s, HIV, herpes
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Rectal involvement:
serosal mets, TOA, radiation, appendicitis, diverticulitis, endometriosis
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Presacral space widening:
>2cm; rectal inflammation (colitis, radiation), infection, tumor, pelvic lipomatosis, edema hemorrhage
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