Moyamoya disease: A retrospective study of 198 cases.

Background: Moyamoya disease belongs to rare diseases which are arousing public awareness of its importance in China. In order to investigate the clinical features of inpatients diagnosed Moyamoya disease, the study was conducted to collect clinical information data of subjects on demographic information and clinical characteristics in Henan, China.

Methods: The data of 198 cases of Moyamoya disease from 56 tertiary hospitals in Henan province from January 2003 to June 2015 were collected retrospectively. Analysis was performed based on demographic, clinical and radiological characteristics of the patients.

Results: The mean onset age was 44.03±14.45 years old. Unilateral limb weakness (36.4%) was the most common physical examination. Primary clinical manifestation was headache and dizziness (50.3%). Cranial CT showed cerebral infarction was mainly located in the frontal lobe (27.4%). MRA and DSA showed lesions mainly located in the middle cerebral artery (30.3% and 18.7%).

Conclusions: Clinical manifestations of Moyamoya disease varied. Early diagnosis was necessary to reduce the misdiagnosis rate of this disease. Symptoms, radiological characteristics, and lesion localization characteristics should be fully considered, especially for indicators with a certain onset age, headache and dizziness, lesion located in the frontal lobe of middle cerebral artery.