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Comparison of histomorphological features and MIB-1 LI score amongst conventional, atypical, and poorly differentiated pediatric chordomas
| Feature | Number of cases- 9 |
||
|---|---|---|---|
| Conventional(4) | Atypical(4) | Poorly Differentiated(1) | |
| Cytologic atypia | 2/4 (50% & minimal) | 4/4 (100% &diffuse) | 1/1 (100% &diffuse) |
| Necrosis | 1/4 (25%) | 3/4 (75%) | 1/1 (100%) |
| Mitoses/10 hpf | 0-1 | 2-10 | 4 |
| MIB1-LI score 1 | 0/4 (0%) | 4/4 (100%) | 1/1 (100%) |
