Retroperitoneal liposarcoma

Case contributed by Mohammad Taghi Niknejad
Diagnosis certain


Abdominal pain and palpable mass on physical exam.

Patient Data

Age: 55 years
Gender: Male

In the left posterior pararenal space, around soft tissue mass, 53 mm in diameter and 29 HU in attenuation value. After IV contrast media, its attenuation value increase up to 69 HU. A tiny calcified focus is noted in its margin. The mass displaces left kidney foreword.

An 8 mm stone was seen in mid calyx of the left kidney.

Fat containing umbilical hernia is evident.


The patient underwent mass resection, and histopathology evaluation confirmed liposarcoma.

Case Discussion

Retroperitoneal liposarcoma is one of the most common primary retroperitoneal neoplasms and a subtype of liposarcoma that may arise in any fat-containing region of the body.

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