Ileo-ileal Intussusception Caused by Primary Monophasic Synovial Sarcoma (SS) of the Ileum.

Synovial Sarcoma (SS) is an uncommon neoplasm, very rare in gastrointestinal tract. We report a case of 57 years old man who reported a previous diagnosis of primary left atrial leiomyosarcoma referred for a follow-up CT, that showed findings compatible with ileo-ileal intussusception. The patient underwent surgical resection and pathological analysis showed that the lead point of intussusception were two polypoid lesions referable to SS. The present case report suggests that, although the incidence of SS is rare, it should be considered in the differential diagnosis of any gastrointestinal non-epithelial malignancy.