Table 1.
Summary of histological features for 98 glioneuronal tumours
| Histological features | Ganglioglioma (n = 43) | DNET (n = 18) | GNT NOS (n = 37) |
|---|---|---|---|
| Specific glioneuronal element | 0% (0/43) | 89% (16/18) | 0% (0/37) |
| Floating neurons | 2% (1/43) | 72% (13/18) | 11% (4/37) |
| Dysplastic neurons | 100% (43/43) | 0% (0/18) | 13% (5/37) |
| Anaplasia | 5% (2/43) | 5% (1/18) | 0% (0/37) |
| Oligodendrocyte-like cells | 26% (11/43) | 94% (17/18) | 43% (16/37) |
| Neoplastic astrocytic component | 98% (42/43) | 11% (2/18) | 59% (22/37) |
| Calcification | 60% (26/43) | 22% (4/18) | 40% (15/37) |
| Necrosis | 0% (0/43) | 0% (0/18) | 0% (0/37) |
| Microvascular proliferation | 9% (4/43) | 11% (2/18) | 3% (1/37) |
| Rosenthal fibres | 19% (8/43) | 0% (0/18) | 3% (1/37) |
| Eosinophilic granular bodies | 49% (21/43) | 0% (0/18) | 3% (1/37) |
| Inflammation | 51% (22/43) | 0% (0/18) | 19% (7/37) |
| Extravascular CD34 + (n = 76) | 80% (28/35) | 23% (3/13) | 82% (23/28) |
| Cortical dysplasia (n = 59) | 16% (4/25) | 0% (0/9) | 12% (3/25) |