Primary synovial sarcoma of the gastrocolic ligament.

A case of primary synovial sarcoma of the gastrocolic ligament is reported in a 37-year-old woman. CT showed an encapsulated intraabdominal cystic tumour with an amorphous solid component. Barium studies showed a mass at the gastrocolic ligament which elevated the gastric antrum and displaced the transverse colon downwards. This is the first report of synovial sarcoma formation in the gastrocolic ligament. This tumour may have originated from pluripotential mesenchyme.