Table 2.
Histopathologic features of 5 EPXAs and 11 eGBMs. Abbreviations: ePXA = epithelioid pleomorphic xanthoastrocytoma; eGBM = epithelioid glioblastoma
| Case No. | Diagnosis | Mitotic rate (per 10 HPF) | Necrosis | Microvascular proliferation | Eosinophilic granular bodies |
|---|---|---|---|---|---|
| 1 | ePXA | 6 | Geographic, large foci | Present, one focus | Present |
| 2 | ePXA | 20 | Pseudopalisading and geographic | Present | Present; rare |
| 3 | ePXA | 5 | Geographic, small focus | Not present | Present; rare |
| 4 | ePXA | 5 | Pseudopalisading and geographic, small foci | Present | Present |
| 5 | ePXA | 7 | Pseudopalisading and geographic | Present | Present |
| 6 | eGBM | 30 | Geographic, extensive | Present | Absent |
| 7 | eGBM | 7 | Pseudopalisading and geographic | Present | Absent |
| 8 | eGBM | 15 | Pseudopalisading and geographic, extensive | Present | Absent |
| 9 | eGBM | 12 | Geographic and focally pseudopalisading | Present | Absent |
| 10 | eGBM | 5 | Geographic | Present | Absent |
| 11 | eGBM | 16 | Geographic; a small focus of pseudopalisading | Present | Absent |
| 12 | eGBM | 30 | Pseudopalisading; geographic occasionally | Present | Absent |
| 13 | eGBM | 7 | Geographic | Absent | Absent |
| 14 | eGBM | 15 | Pseudopalisading | Present | Absent |
| 15 | eGBM | 8 | Absent | Present, rare foci | Absent |
| 16 | eGBM | 4 | Pseudopalisading | Present | Absent |