Intra-abdominal Desmoplastic Small Round Cell Tumor: CT and MR Findings: a case report

Desmoplastic small round cell tumor is a rare malignant small cell neoplasm which tends to occur in adolescents and young adults. This tumor usually presents as an abdominopelvic mass with intraperi- toneal and hepatic metastasis. We report a case pre- senting as abdominal masses with unilateral pleural seeding. A 15-year-old woman without previous history of major diseases came to our hospital because of shortness of breath for 2 weeks. Chest X-ray revealed massive amount of left pleural effusion. CT and MRI suggested two intraabdominal masses with multiple left pleural seeding and massive left pleural effusion. The definitive diagnosis was made with the aid of echo-guided fine needle biopsy.