Moyamoya disease: revision and description of a number of pedriatic cases

Moyamoya disease is caused because of progressive occlusion of the arterial circle of Willis, leading to a compensatory net-like abnormal vessels development. The objective is to describe the number of cases in our center (tertiary hospital). Retrospective study. Revision of pediatric medical histories diagnosed of moyamoya disease or moyamoya syndrome (in case of predisposing disease) between 2005 and 2018. Demographic variables were collected, related to diagnosis, risk factors, treatment, and follow-up. Seven cases were collected with a median age of 6 years and an equitable distribution by sex. Five associated predisposing pathologies (Down syndrome, neurofibromatosis, sickle cell disease, Behcet). The main clinical diagnosis was neurological focus (five cases), followed by epileptic seizures (four), and headache (two). One was asymptomatic at diagnosis. Six strokes were documented, five of them were isquemic. The arteriography (goldstardard) was made in five patients. Five presented bilateral involvement of the vessels, the internal carotid arteries and the middle cerebral arteries were the most affected. Six received acetylsalicylic acid treatment and five of them required antiepileptic drugs. Revascularization surgery (encephaloduroarteriomyosinangiosis) was performed in four patients, and in one, strokes persisted. The most prevalent sequelae were hemiparesis and psychomotor retardation. The risk factors presented in our patients match to those described in the literature. The symptoms at the onset can be diverse and ischemic strokes predominate in our series. Revascularization surgery was effective in more than half of the cases. Subsequent follow-up is necessary to assess complications and sequelae.