December 6, 2010

Peritoneal Sarcomatosis

Axial CT image of the abdomen shows soft-tissue implants and omental caking (arrows) with small ascites.

Peritoneal Surface Malignancy
  • Carcinomatosis
  • Lymphomatosis
  • Sarcomatosis
  • Mesothelioma
  • Desmoplastic small round cell tumor
Peritoneal Sarcomatosis
  • Disseminated intraperitoneal spread of sarcoma in the absence of significant extraabdominal sites of disease
  • Rare disease.
  • Most commonly due to GI stromal tumor (GIST), liposarcoma and leiomyosarcoma

Imaging Findings
  • Similar to other peritoneal surface malignancy: soft-tissue implants along peritoneum and omentum
  • Often hypervascular, and with variable amount of ascites (differ from other peritoneal surface tumors)
Our case: Sarcomatosis due to GIST. Ascites is believed to be due to treatment with imatinib

Oei TN, Jagannathan JP, Ramaiya N, Ros PR. Peritoneal sarcomatosis versus peritoneal carcinomatosis: imaging findings at MDCT. AJR 2010; 195:W229-W235.

No comments:

Post a Comment