Presentation
Right flank pain with a palpable mass.
Patient Data
There is a large right retroperitoneal solid-cystic mass ( 23 x 15 x 13 cm) in contact with the psoas muscle with moderate and heterogeneous enhancement of the solid component with thickened enhanced internal septa. No calcification or fatty component is seen within the mass. The right kidney is displaced anteromedially with no fatty interface with the mass. The liver is displaced superiorly, the adrenal gland medially, and the duodenum/pancreas to the left with laminated IVC.
No enlarged abdominal or pelvic lymph nodes. No intraperitoneal effusion is seen.
Case Discussion
CT features of a large retroperitoneal solid-cystic mass with thickening and enhancement of the internal septa and the solid component suggest probably a retroperitoneal sarcoma.
Additional contributor: C. Boukaaba, MD