Ultrasonic diagnosis of omental cysts.

The ultrasonic findings in 2 patients with omental cysts are described. The correct diagnosis was made by combining ultrasound observations with gastrointestinal contrast study results, plain film findings, medical history and physical examination. Ultrasonically, an omental cyst appears as a well-outlined, sonolucent, transonic abdominal mass. Ultrasonography is recommended as an aid in the preoperative diagnosis of mesenteric cysts.