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Cerebrospinal fluid (CSF) abnormalities associated with acute migraine have not been extensively documented in the literature. Rarely, migraine may be accompanied by a CSF polymorphonuclear pleocytosis. Individual case reports and case series have described a syndrome of atypical migraine with prolonged focal neurologic symptoms and CSF lymphocytic pleocytosis. In 1997, Gomez-Aranda et al reported on a series of 50 patients with what was termed "pseudomigraine" involving attacks of headache with transient focal neurologic symptoms and lymphocytic pleocytosis (PMP). We present a similar case of a patient with migrainelike headaches, prolonged focal neurologic deficits, and CSF lymphocytic pleocytosis. [ABSTRACT FROM AUTHOR]