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Insights into Imaging
Fig. 24 | Insights into Imaging

Fig. 24

From: Primary and secondary tumors of the peritoneum: key imaging features and differential diagnosis with surgical and pathological correlation

Fig. 24

Retroperitoneal liposarcoma with peritoneal and retroperitoneal recurrence in a 32-year-old woman. Coronal (a) and axial (b, c) CT images in the portal phase show a voluminous solid mass with calcifications arising from the anterior perirenal fat (blue arrows) and containing macroscopic fat (yellow arrows). Complete surgical resection was made and the pathological specimen showed a mixture of well-differentiated and dedifferentiated areas of LPS. d, e Follow-up CT performed 20 months after surgery showed multifocal peritoneal and retroperitoneal recurrence consisting of a combination of dedifferentiated solid nodules (red arrows) and well-differentiated fatty implants (yellow arrows), located mainly in the left paracolic gutter and the lateral margin of the psoas muscle

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