Table 2.
Histological diagnoses made on tissue samples acquired by stereotactic biopsy
| Diagnosis | Frame-based (n=63) | Frameless (n=113) | IoMRI-guided (n=112) |
|---|---|---|---|
| Diagnostic biopsy* | 60 (95.2%) | 101 (89.4%) | 92 (82.1%) |
| Astrocytoma, Grade I or II | 2 | 1 | 3 |
| Astrocytoma, Grade III or IV | 32 | 71 | 48 |
| Ungraded astrocytoma | 2 | 2 | 8 |
| Oligoastrocytoma | 1 | 3 | 5 |
| Oligodendroglioma | 2 | 1 | 4 |
| Lymphoma | 11 | 9 | 10 |
| Metastasis | 2 | 2 | 0 |
| Abscess | 2 | 3 | 0 |
| Demyelinating lesion | 3 | 6 | 5 |
| Others | 3 | 3 | 9 |
| Non-definitive diagnosis* | 3 (4.8%) | 12 (10.6%) | 20 (17.9%) |
| Atypical cell / Reactive changes | 1 | 4 | 10 |
| Inflammatory cells | 0 | 4 | 1 |
| Hypercellular brain tissue | 1 | 0 | 1 |
| Necrosis | 1 | 1 | 0 |
| Gliosis | 0 | 0 | 5 |
| Normal brain | 0 | 1 | 1 |
| others | 0 | 2 | 2 |
| Total | 63 | 113 | 112 |
*
P<.05 Frame-based vs. ioMRI-guided