Hemiparkinsonism secondary to an epidermoid cyst with complete recovery after surgical resection: Case report and review of the literature

Hemiparkinsonism is an exceptionally rare form of secondary Parkinsonism that manifests with unilateral symptoms and is often accompanied by ipsilateral body atrophy. Epidermoid cysts are benign, slow-growing tumors that can present with varying neurological symptoms. We report a case of a 30-year-old male who exhibited symptoms of Hemiparkinsonism secondary to a right-sided epidermoid cyst. The patient presented with three months of progressive resting left arm tremor and two weeks of left hand weakness. The patient exhibited a central left facial droop and left arm weakness with rigidity and bradykinesia. Unified Parkinson Disease Rating Scale (UPDRS) Part III score was 13. Gross total resection was achieved using a right frontotemporal craniotomy via a preauricular, subtemporal approach. Complete reversal of symptoms occurred after surgical resection.