Table 3 Morphological evaluation of borderline cases.
Characteristics | S8 | S9 | S10 | S11 |
|---|---|---|---|---|
Necrosis | Present, focal | Present, focal | Absent | Present, focal |
Architectural pattern | Trabecular | Solid, trabecular, rosettes | Solid, nested, trabecular | Rosettes, lobular with peripheral palisading |
Average mitotic rate | 13 | 14 | 17 | 26 |
Average Ki-67 (%) | 18 | 23 | 15 | 58 |
RB1 | Preserved expression | Preserved expression | Preserved expression | Preserved expression |
P53 | Wild-type | Wild-type | Wild-type | Wild-type |
