Hemi-Hemimegalencephaly or Posterior Quadrantic Dysplasia, a Rare Cause of Focal Epilepsy in an Otherwise Healthy Young Woman: A Case Report

Hemimegalencephaly (HME) and its more localized form - posterior quadrantic dysplasia (PQD) - are rare malformations of cortical development (MCD) that normally manifest as refractory focal epilepsy and cognitive impairment in children. We report a case study of a 19-year-old woman who presented with seizure-like symptoms to the emergency department after discontinuing her seizure treatment having fled her country. MRI revealed typical signs of PQD. This case study demonstrates how an unusual mild clinical presentation led to the late diagnosis of this rare MCD.