Table 2.
Pathologic features by group in adenoid (A-GBM), true epithelial (TE-GBM) and Epithelioid (E-GBM) glioblastomas
| N(%) present | A-GBM | E-GBM | TE-GBM |
|---|---|---|---|
| Frequency | 28 (48) | 10 (17) | 20 (35) |
| Sarcomatous component | 11 (39) | 3 (30) | 11 (55) |
| Papillary structures | 6 (21) | 1 (10) | 6 (30) |
| Whorls | 6 (21) | 1 (10) | 10 (50) |
| Myxoid Stroma | 14 (50) | 0 (0) | 4 (20) |
| Vascular changes | 12 (43) | 6 (60) | 10 (50) |
| Hypertrophy | 8 (29) | 5 (50) | 7 (35) |
| Glomeuroloid vessels | 4 (14) | 1 (10) | 2 (20) |
| Necrosis | |||
| Pseudopalisading | 2 (7) | 1(10) | 3 (15) |
| Coagulative | 24(86) | 9 (90) | 16 (80) |
| Inflammation | 8 (29) | 1 (10) | 5 (25) |
| Hemosiderin | 9 (32) | 5 (50) | 5 (25) |
| Most proliferative component | |||
| Adenoid/epithelial | 25 (96) | 2 (20) | 16 (84) |
| Glial | 1 (4) | 7 (70) | 2 (11) |
| Sarcoma | 0 (0) | 1 (10) | 1 (5) |
| Evident Infiltrative glial component | |||
| At diagnosis | 17 (61) | 6 (60) | 11 (61) |
| At recurrence | 1 (4) | 1 (10) | 1 (6) |