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Distribution of IDH genotypes in chondrosarcomas
| IDH gene | IDH genotypes | No. of positive cases (%) |
|---|---|---|
| IDH1 | R132, unspecified | 13 (5.5) |
| R132C | 81(34.2) | |
| R132F | 1(0.4) | |
| R132G | 30 (12.7) | |
| R132H | 17 (7.2) | |
| R132I | 1 (0.4) | |
| R132L | 24 (10.1) | |
| R132S | 13 (5.5) | |
| IDH2 | R172, unspecified | 11 (4.6) |
| R172G | 4 (1.7) | |
| R172 M | 6 (2.5) | |
| R172S | 31 (13.1) | |
| R172T | 2 (0.8) | |
| T172W | 1 (0.4) | |
| Others | 2 (0.8) | |
| Total | 237 |
