Teenager whose gastrostomy jejunostomy tube was replaced with difficulty 1 day before and now has abdominal pain and pneumoperitoneum on AXR

Jejunostomy tube injection showing jejunostomy tube tip is in peritoneum.
AP image obtained after injection of contrast through the jejunostomy port shows that contrast is not in the jejunum and instead is in the peritoneum.

The diagnosis was gastrostomy jejunostomy tube malposition in the form of the jejunostomy tube tip being in the peritoneal cavity.