Abstract
An anti-Purkinje cell antibody (APCA) was found in serum and CSF of 2 patients with paraneoplastic cerebellar degeneration (PDC) and breast carcinoma. Integrity of the blood-brain barrier (BBB) was normal in one patient and slightly damaged in the other. In both patients CSF IgG index was normal, but CSF/serum APCA ratio and CSF IgG APCA index were elevated suggesting that a selective concentration of the APCA in CSF occurs in patients with PCD. This feature supports the hypothesis that APCA may play a role in the pathogenesis of PCD.
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