oncology-treatment-timeline

Maps cancer treatment history from FHIR resources into a structured timeline of diagnosis, staging, treatment, response assessment, and surveillance. Use when user asks to "review cancer treatment", "oncology timeline", "treatment history", "cancer staging", "tumor markers", "chemo regimen", "treatment response", mentions a specific cancer type, or needs a longitudinal oncology summary. Do NOT use for cancer screening (use preventive-care-compliance-report), benign tumors, or palliative care planning.