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Appendiceal Kaposi's sarcoma: a cause of right lower quadrant pain in the acquired immune deficiency syndrome.

These case reports describe two patients with acquired immune deficiency syndrome (AIDS) who presented with acute right lower quadrant pain. Appendiceal involvement with Kaposi's sarcoma accounted for the clinical presentation, and was confirmed histologically. This association emphasizes the diagnostic confusion that may be caused by acute abdominal conditions in the AIDS population. Abdominal pain may result from AIDS-related or unrelated processes; appropriate operative intervention requires recognition of the various diagnostic possibilities.