GIT III (crohn's)

Question 1

Radiological features of crohn’s disease

Answer 1

AXR: renal stone, gallstone, joints changes
Contrast study: skip lesions and discrete ulcers in:
Small bowel 70-80%
Small and large bowel: 50%
Large bowel only 15-20%

Question 2

Crons disease on fluoroscopy:

Answer 2

• Widely separated loops of bowel due to mesenteric infiltration and • thickened folds dt edema
• cobblestone appearance
• pseudodiverticula
• string sign

Question 3

Mucusal ulcer when severe leads to

Answer 3

cobblestone appearance
May leads to sinus tracts and fistula

Question 4

Contraction at the site of ulcer with ballooning of the opposite side leads to the formation of:

Answer 4

Pseudodiverticula or pseudosacculation

Question 5

Tubular narrowing dt spasm or stricture

Answer 5

String sign

Question 6

CT findings of crohn’s disease

Answer 6

Fat halo sign
Comb sign
++ thickening and enhancement of bowel wall
Stricutures and fistula
Mesenteric/intra-abdominal abscess or phegmon formation

Question 7

Comb sign found in:

Answer 7

Crohns disease
lupus enteritis (SLE mesenteric vasculitis)

Question 8

MRI findings of crohn’s disease

Answer 8

Mucosal thickening and enhancement
Involving the Iliocecal junction
Narrowing of the lumen and thickening in the wall of ileocecal junction are seen by MRI enterography