Journal of clinical gastroenterology
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In most instances, patients with an acute abdomen and pneumoperitoneum have a perforated hollow viscus as the underlying cause. Clinicians must not forget, however, some of the less common causes of free air in the abdomen. We describe pneumoperitoneum from a vaginoperitoneal fistula, developing after hysterectomy, well known to gynecologists, but rarely noted in the medical literature.