eng Science and Education Publishing American Journal of Medical Case Reports 2374-216X 2019-07-21 7 9 217 218 10.12691/ajmcr-7-9-9 AJMCR2019799 article Hiro Matsukura matsukura-npr@umin.org 1 Satomi Inomata 2 Tomomi Tanaka 3 Department of Pediatrics, Saiseikai Toyama Hospital Division of Neonatology, Maternal and Perinatal Center, Toyama University Hospital Department of Pediatrics, Faculty of Medicine, University of Toyama Cerebral cavernous malformations (CCMs), which occur in a sporadic or familial form, can predispose a person to seizures, focal neurological impairment, and hemorrhage. Upon discovery floating in a swimming pool, a 3-year-old boy was unresponsive and not breathing, but he achieved uneventful recovery after adequate cardiopulmonary resuscitation. Diagnostic head magnetic resonance imaging confirmed multiple CCMs. Absence of affected family members was indicative of the sporadic form. Subsequently, he developed social communication deficits and restricted and repetitive behaviors, suggestive of autism spectrum disorders (ASD). Comorbidity of CCMs and ASD is rare. Seizure associated with multiple CCMs might precipitate unintentional drowning. http://pubs.sciepub.com/ajmcr/7/9/9/ajmcr-7-9-9.pdf autism spectrum disorders magnetic resonance imaging seizure Tanaka-Binet Intelligence Quotient