• Hongwu Zhang, Yu Li, Baofu Liu, Lixue Shen, Shulei Wang, and Hongxin Yao.
• Department of Pediatric Surgery, Peking University First Hospital, Beijing, China.
• World Neurosurg. 2020 Oct 1; 142: 396-400.

BackgroundHypothalamic hamartomas (HHs) are rare, and it is even rarer when combined with gray matter heterotopia (GMH) and polymicrogyria (PMG).Case DescriptionA 5-year-old boy with HH, GMH, and PMG was retrospectively evaluated. The clinical data, including the symptoms, examinations, diagnosis, and treatment, were collected. The patient had a chief complaint of gelastic seizures and intellectual deficiency. Brain magnetic resonance imaging showed HH, paraventricular nodular heterotopia, and PMG. Video electroencephalographs were normal. The patient underwent resection of the HH via transcallosal transseptal interforniceal approach. Seizures disappeared immediately after complete resection of HH, and the intellectual development improved.ConclusionsIn this extremely rare case, resection of the HH eliminated the symptoms. Nonetheless, we still need to be cautious about the possible epilepsy that may be caused by GMH and PMG.Copyright © 2020 Elsevier Inc. All rights reserved.

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