May Be Caused by

 Common

Battered child syndrome

Iatrogenic bowel perforation

Intestinal obstruction

Meconium ileus

Necrotizing enterocolitis

Respirator therapy

Trauma

 Uncommon

Gastric rupture of newborn

Hirschsprung disease

Ischemic enteritis

Meconium plug syndrome

Perforated peptic or stress ulcer

Small left colon syndrome