PRIMARY LEIOMYOSARCOMA ARISING IN THE LESSER SAC - REPORT OF A CASE

We describe herein a very rare case of leiomyosarcoma arising in the l esser sac. A 58-year-old man with a psychiatric disorder was admitted to our department for the investigation of epigastralgia and nausea wh ich he had been suffering since the previous month. A laparotomy revea led that the abdominal mass, found on physical examination, was a prim ary lesser omental tumor, histological examinations of which confirmed a diagnosis of leiomyosarcoma. The tumor cells showed a DNA diploid p attern. Leiomyosarcoma of the lesser sac is extremely unusual and it i s important that it be distinguished from an extraluminal tumor of the abdomen.