Leiomyoma of the duodenum--a case report.

A 36-year-old man with anemia due to gastrointestinal bleeding, diagnosed to have a leiomyoma of the duodenum, is described. The conventional barium meal study and gastroendoscopy were useful for diagnosing the lesion. More invasive radiological methods, such as abdominal angiography and technetium-99m scintigraphy failed to detect the tumor. Early diagnosis and resection of the tumor would result in a good prognosis.