TABLE 2.
Preoperative Evaluationa
| Imaging and Clinical Studies | No. (%) of Total |
|---|---|
| Focal lesion on CT scan | 59/102 (57.8) |
| Focal lesion on MRI | 115/167 (68.9) |
| Enhancing lesion on MRI | 93/163 (57.1) |
| Catheter angiogram performed | 44/169 (26.0) |
| CT angiogram performed | 2/169 (1.2) |
| MR angiogram performed | 26/169 (15.4) |
| Vasculitis/vasculopathy on angiogram | 11/169 (6.5) |
| PET | 21/166 (12.7) |
| Spectroscopy | 18/165 (10.9) |
| EEG | 53/165 (32.1) |
| Normal | 12 (7.2) |
| Slowing | 30 (18.2) |
| Seizure | 11 (6.7) |
| Laboratory Studies | Mean (SD) | No. of Patients Tested |
|---|---|---|
| INR | 1.0 (0.1) | 152 |
| Platelet count, ×1000 cells/mm3 | 270 (105) | 160 |
| ESR, mm/h | 28.5 (31.0) | 73 |
| CRP, mg/L | 19.5 (33.3) | 40 |
| WBCs, ×100 cells/mm3 | 9.8 (8.8) | 160 |
| Cerebrospinal fluid studies | ||
| Nucleated cells, cells/μL | 60 (224) | 92 |
| Protein, mg/dL | 132.2 (214) | 91 |
| Glucose, mg/dL | 68.4 (25.1) | 91 |
| IgG index | 0.96 (1.7) | 30 |
| Platelet function screen | 28 | |
| Epinephrine, s | 147 (76) | |
| ADP, s | 76 (47) |
a
CT, computed tomography; MRI, magnetic resonance imaging; MR, magnetic resonance; PET, positron emission tomography; EEG, electroencephalography; INR, international normalized ratio; ESR, erythrocyte sedimentation rate; CRP, C-reactive protein; WBCs, white blood cells; IgG, immunoglobulin G, ADP, adenosine diphosphate. Platelet function screen normal values: epinephrine (60-160), ADP (50-110).