Hepatoblastoma | Figure 1

CincyKidsRad

Cincinnati Children's Radiology

Hepatoblastoma

Axial T2-weighted MRI in a child with hepatoblastoma shows PRETEXT IV multifocal tumor (arrowheads) and extensive portal venous thrombosis (arrow). Hepatoblastoma is staged using the PRETEXT staging system. The PRETEXT number is determined by identifying the number of contiguous hepatic sections involved by tumor that would have to be resected in order to completely excise the tumor. In addition to determining a PRETEXT number staging includes the identification of any annotation factors such as portal venous involvement, hepatic venous involvement, multifocal tumor, tumor rupture, extrahepatic spread, and distant metastases.

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