Prognosis of patients with suspected primary CNS angiitis and negative brain biopsy.

The authors retrospectively analyzed 25 patients who had a nondiagnostic brain biopsy for clinically suspected primary CNS angiitis to determine the effect of immunosuppressive therapy on 1-year outcome. Good outcome was seen in 6 of 10 treated patients and in 8 of 15 untreated patients (p= 0.93). These findings do not indicate that the addition of immunosuppressive therapy significantly enhances outcome of patients with clinically suspected primary angiitis of the CNS and a nondiagnostic brain biopsy.