R0 resection
Pronunciation: /ɑr ziroʊ/
Complete tumor removal with microscopically negative margins and no residual disease.
Full Definition
R0 resection represents the gold standard in oncologic surgery, indicating complete macroscopic and microscopic removal of all tumor tissue with clear surgical margins. This classification is part of the R classification system where R0 signifies no residual tumor, R1 indicates microscopic residual disease, and R2 denotes macroscopic residual tumor. Achieving R0 resection is associated with the best long-term outcomes and lowest recurrence rates, making it the primary goal in curative cancer surgery whenever technically feasible.
Usage
Usage note: Always capitalize R and use numeral 0; part of standardized R classification system (R0, R1, R2).
In Context
- "The patient achieved R0 resection with margins greater than 2 cm in all directions." — Multidisciplinary meeting summary
- "Despite extensive surgery, R0 resection was not achievable due to vascular involvement." — Operative report