PRETEXT
Pronunciation: PREE-tekst
Also written as: PRETEXT — PRE-Treatment EXTent of tumor
A staging system for pediatric liver tumors based on the number of liver segments involved and vascular relationships.
Full Definition
PRETEXT (PRE-Treatment EXTent of tumor) is a radiological staging system specifically designed for pediatric liver tumors, particularly hepatoblastoma. The system divides the liver into four segments and classifies tumors as PRETEXT I through IV based on the number of contiguous segments involved by tumor. Additional criteria include vascular involvement (V for vena cava, P for portal vein, H for hepatic vein), extrahepatic disease (E), multifocal disease (F), and metastases (M). This staging system is crucial for surgical planning, determining resectability, and guiding treatment decisions including the need for liver transplantation.
Usage
Usage note: Always capitalize as an acronym; used specifically for liver tumors, not applicable to other pediatric cancers.
In Context
- "The hepatoblastoma was classified as PRETEXT III with portal vein involvement." — Radiology staging report
- "PRETEXT IV tumors typically require liver transplantation for complete resection." — Multidisciplinary team meeting notes