R2

**Semantic type:** Finding

**Definition:** Presence of macroscopic residual tumor after treatment.

**Synonyms:** - Gross Residual Tumor - Macroscopic Residual Tumor - R2 - Gross Residual Disease - R2 - Gross Residual Disease - R2 - Gross Residual Disease - R2: Macroscopic residual tumor - R2: Macroscopic residual tumor. Grossly visible residual disease.