PMC5705882_01
Abdominal CTA showing a lobulated low-density soft tissue mass within the retroperitoneum with involvement of the bilateral psoas muscles.
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fig1
Abdominal computed tomography angiography (CTA) showed a retroperitoneal 13.1 x 10 x 5 cm hypodense mass lesion at the L3-L5 level, extending to the bilateral psoas muscles (Figure 1).
Fine needle aspiration revealed benign skeletal muscle, fibrous tissue, and few fragments of necrotic material.
CRIPA2017-4076159.002.jpg
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fig2
CT-guided core biopsy was performed to evaluate the retroperitoneal mass, which revealed ischemic necrosis involving skeletal muscle and fibro connective tissue (Figure 2).