PRETEXT annotation factor V is a hepatoblastoma tool commonly applied in Pediatric Oncology. PRETEXT factor V (hepatic vein/IVC involvement): hepatic vein/IVC obliteration/encasement or intravascular hepatic vein thrombus. Use the interactive calculator for inputs, limitations, and primary references.

Not a substitute for clinical judgment. Verify critical values with primary literature, local protocols, and specialist input when appropriate.