Retroperitoneal mass: A diagnostic challenge

A 62-year-old patient consulted for abdominal pain, and abdominal CT scan (Fig. 1) revealed a hepatoduodenal mass. Complementary tests included: liver MRI, which showed a tumor mass in the hepatoduodenal ligament dependent on the 2nd part of the duodenum; and endoscopic ultrasound for biopsy, which described a tumor at the biliopancreatic junction with pathology results that identified a mesenchymal neoplastic proliferation. During surgery, a tumor was observed originating in the juxtarenal inferior vena cava (Fig. 2), which we resected and repaired with a bovine pericardial patch. The pathology study confirmed leiomyosarcoma of the inferior vena cava.

Fig. 1

Fig. 2