A case of omental torsion seen in a 16 year old male is reported herein. Abdominal pain in the right lower quadrant suddenly developed just after the patient twisted his waist and an emergency laparotomy revealed a hemorrhagic mass at the edge of the right omentum, which was excised. Histological examination of the resected specimen showed hemorrhage without any venous thrombosis or infarction, possibly suggestive of omental torsion with early spontaneous derotation. The patient was successfully treated as a case of omental torsion.

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The coexistence of hyperthyroidism and peptic ulcer is considered to be extremely rare. We have treated 24 patients with both hyperthyroidism and peptic ulcer during the years 1968-1978. With regard to the correlation between hyperthyroidism and peptic ulcer, we found that the mean value of gastric acid output was higher in the hyperthyroid patients than in the controls, and an extremely high gastric acid output was noted in 8 of the hyperthyroid patients. These results suggest that hyperthyroidism coexisting with peptic ulcer may not be so rare.

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