Ultrapremature newborn with massive abdominal distension who has passed only a little meconium after 4 days

Enema of meconium obstruction of prematurity
AXR AP (above) shows massively dilated loops of bowel throughout the entire abdomen. AXR AP taken at the beginning of an enema performed with water-soluble contrast (lower left) shows meconium filling almost the entire colon. AXR AP taken later in the exam (lower right) shows reflux of contrast into massively dilated loops of small bowel. Several hours after the enema, the patient passed a large amount of meconium and the abdomen became completely decompressed.

Teenager with poorly controlled inflammatory bowel disease

CT of Crohn's disease with fistula and abscess
Axial CT with contrast of the abdomen shows a thick-walled mass that is filled with air and oral contrast that is located medial to the oral contrast-filled thickened ascending colon and above the right psoas muscle. An extensive amount of inflammatory change is seen in the mesenteric fat in the right lower quadrant.

The diagnosis was Crohn’s disease with a fistula to an abscess above the right psoas muscle.

School ager with abdominal pain, diarrhea, and vomiting

AXR and CT and US of pseudomembranous colitis
AXR AP (above left) shows thickening of the haustra of the transverse colon (thumb printing). Axial CT with contrast of the abdomen (above right) shows diffuse thickening of the colon which is markedly thickened in the ascending colon compared to the descending colon. An accordion sign is demonstrated in the ascending colon. Sagittal (below left) and transverse (below right) US of the cecum show a diffusely thickened cecum.

The diagnosis was pseudomembranous colitis.