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Insights into Imaging
Fig. 19 | Insights into Imaging

Fig. 19

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

Fig. 19

Pseudomyxoma peritonei with signet ring cells arising from a mucinous adenocarcinoma of the colon. a Axial CT image in the portal phase shows the primary neoplasm presenting as segmental and concentric thickening of the ascending colon (red arrows). Coronal (b) and axial (c, d) CT images show significant disease in the epigastric region (zone 2), with hypodense infiltration of the hepatic hilum (yellow arrows) associated with small calcifications and severe stenosis of the porta hepatis and inferior vena cava. Extension through the intrahepatic periportal space and the falciform ligament is also present (black arrows). Note the more aggressive appearance in comparison with the classic pseudomyxoma secondary to a LAMN. e, f) H&E stain photomicrographs show a high-grade mucinous adenocarcinoma with signet ring cells (red arrows)

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