PRETEXT annotation factors E, F, R, C, N and M is a hepatoblastoma tool commonly applied in Pediatric Oncology. PRETEXT annotation factors checklist: extrahepatic spread, multifocality, rupture, caudate involvement, lymph nodes, and distant metastases. 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.