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Abstract #4627

Magnetic resonance imaging features of parenchymal mass with tumor in vein in patients with cirrhosis

Saya Igarashi1, Adrija Mamidipalli1, Carolina Constantino2, Atsushi Higaki1, Mohanad Alhumayed1, Jonathan Hooker1, Chul Park1, and Claude B. Sirlin1

1Liver Imaging Group, Radiology, San Diego, CA, United States, 2Dimagem Diagnostico por Imagem, Rio de Janeiro, Brazil

The purpose of this study is to determine in cirrhotic patients the proportion of MRI-diagnosed TIV cases with parenchymal masses, the proportion of cases due to HCC or non-HCC malignancy, and whether assessment of the parenchymal mass allows differentiation of the malignancy type. All TIV cases had parenchymal masses. Using a composite reference standard and excluding tumors with no reference standard, the underlying malignancy was HCC in 91% (41/45), ICC in 4% (2/45), and H-ChC in 4% (2/45). LI-RADS categorization of the parenchymal mass may help identify patients in whom TIV is not due to HCC. In particular, patients with TIV and LR-M parenchymal masses may need biopsy to exclude non-HCC malignancy.

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