Abstract
A porencephalic cyst is a rare disorder, with the etiology of brain parenchymal loss as a result of perinatal cerebral ischemia or hemorrhage leading to the accumulation of cerebrospinal fluid within the parenchyma. It is diagnosed radiologically, and management depends on the clinical manifestations. The present case depicts a porencephalic cyst presenting with cerebral right-sided hemiparesis in adulthood. The cyst dimensions measured 2.6*0.6*0.5 cm in the left lateral ventricle with associated hemiparesis of the right side at the time of the first MRI scan before Deep Brain Sound Stimulation (DBSS) sessions. A reduction in the size of the cyst to 16*7*7 mm and then to a subsequent 8 mm was documented during a novel, non-invasive deep brain stimulation via sound (DBSS) treatment. In addition, right upper and lower limb power increased to 5/5 with improved coordination in a complete neurological evaluation. DEXA scan showed an increased bone density and muscle bulk.
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