Retroperitoneal lymphoma


Biopsy of the mass confirmed non-Hodgkin's lymphoma that was subsequently treated with chemotherapy with good response. The progression of size of the lesion is consistent with tumor recurrence.

Retroperitoneal neoplasms are often large at the time of presentation due to diagnostic delay. The differential diagnosis for retroperitoneal masses includes retroperitoneal sarcoma (liposarcoma, leiomyosarcoma, rhabdomyosarcoma, or malignant fibrous histiocytoma), retroperitoneal metastasis and retroperitoneal lymphoma.