A 16-year-old school boy with multiple skeletal deformities (in the form of severe pectus excavatum, kyphoscoliosis, and hallux valgus) was investigated for a sudden development of right hand parkinsonian-like tremor and clumsiness and for the findings of features of mild left sided cerebellar dysfunction. Magnetic resonance imaging of the brain with and without contrast were done revealing two small arachnoid cysts, one in the left anterior temporal area within the left middle intracranial fossa causing minimal focal mass effect on the adjacent parenchyma, and the other one was in the posterior intracranial fossa inferolateral to the left cerebellum causing pressure effect on it. The patient was referred to the department of neurosurgery whose decision was not to operate.
Key words: Parkinsonian tremor, arachnoid cysts, cerebellum, intracranial fossa
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