Preschooler with a palpable midline abdominal mass

Surgical image of rhabdomyosarcoma of the bladder
Surgical image shows the mass (between the surgeon’s fingers) to be extraperitoneal in location, originating from the left posterior aspect of the dome of the bladder. The mass did not appear to invade any normal structures except where it originated in the bladder, which is along the inferior edge of the image.

The diagnosis was rhabdomyosarcoma of the bladder.

Female infant with a right ovarian cyst on prenatal ultrasound and an incidental abdominal calcification noted on a CXR

Surgical image of ovarian torsion
Surgical image shows a large circular and soft mass that was adherent to, but not invading, the hepatic flexure, omentum, and distal ileum and which was no longer connected to any pelvic structures. There was no ovarian tissue in the right adnexa. The left ovary was normal.

The diagnosis was ovarian torsion that most likely occured in-utero.

School ager with appendectomy 3 months ago, now with abdominal pain and vomiting

Surgical image of small bowel obstruction due to abdominal adhesions
Surgical image shows dilated and congested loops of small intestine in the upper right corner and normal sized decompressed loops of small bowel adjacent to them. A volvulus was noted at the level of the terminal ileum, caused by adhesions from the cecum to the small bowel, forming a closed loop obstruction that was causing bowel wall congestion.

The diagnosis was small bowel obstruction due to abdominal adhesions.

Infant with non-bilious and bilious vomiting

Surgical image of Meckel's diverticulum
Surgical image shows shows multiple dilated loops of small bowel in the background with a sharp transition point seen in the center of the image in the terminal ileum where on its anti-mesenteric border a diverticulum is seen with an omphalomesenteric duct remnant coming off it. This remnant had been attached to the under surface of the umbilicus, serving as a fulcrum for a small bowel volvulus, resulting in a small bowel obstruction.

The diagnosis was Meckel diverticulum causing a small bowel volvulus and a small bowel obstruction.