radionecrosis
Pronunciation: /ˌreɪdioʊnɛˈkroʊsɪs/
Radiation-induced tissue death that can mimic tumor recurrence on imaging, requiring careful diagnostic distinction.
Full Definition
Radionecrosis is a late complication of brain radiation therapy characterized by tissue death that can occur months to years after treatment completion. This condition presents a significant diagnostic challenge as it can be indistinguishable from tumor recurrence on conventional imaging. Radionecrosis requires different management strategies than tumor progression, making accurate diagnosis crucial. Editors must understand the temporal relationship to radiation treatment, dose-volume factors that influence risk, and advanced imaging techniques used for differential diagnosis.
Usage
Usage note: May be written as one word or two; specify timing relative to radiation treatment and dose when known.
In Context
- "Advanced imaging techniques including PET and perfusion MRI were used to distinguish radionecrosis from tumor recurrence." — Diagnostic imaging report
- "The patient developed symptomatic radionecrosis 14 months after completing stereotactic radiosurgery." — Late effects documentation