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Arch Neurol. 2000;57:128.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

REPORT OF A CASE

Arachnoid cysts are intra-arachnoid collections of cerebrospinal fluid (CSF) that produce neurological symptoms either by compressing the adjacent neural tissue or by obstructing cerebrospinal fluid flow.¹ Most of these cysts are congenital. Consequently, about 75% of those causing symptoms are diagnosed in young children. Meningitis, trauma, and hemorrhage are considered to be causative or contributing factors in the genesis of acquired arachnoid cysts.² The cysts located at the craniospinal junction are very rare.² We describe a 48-year-old man with a gait disorder and a 30-year history of frequent falls. He had tuberculous meningitis in the second decade of life. No other medical antecedents were recorded. Neurological examination revealed a spastic paraparesis with brisk tendon reflexes and a bilateral Babinski sign. The rest of the findings were normal, and no sensory level was found. A craniocervical magnetic resonance imaging scan (Figure 1) showed a cyst whose contents had cerebrospinal . . . [Full Text of this Article]