Abstract: Zhang Zhihong, Zhang Ji, Qian Qiufang Department of Dermatology, Shanghai Children′s Hospital, Children′s Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200040, China Corresponding author: Qian Qiufang, Email: qianqf@shchildren.com.cn 【Abstract】 Objective To assess the clinical value of magnetic resonance imaging （MRI） in the diagnosis of deep vascular diseases in children with superficial vascular diseases. Methods From January 2012 to December 2016, 105 children with superficial vascular diseases in the Department of Dermatology of Shanghai Children′s Hospital underwent MRI examination, and the clinical and imaging data were analyzed. Results Of the 105 children, 42 were male and 63 were female. Their ages ranged from 0.5 to 168 months with an average age of 21.6 months. As MRI showed, 25（23.8%） children had deep vascular diseases, which could not be seen with naked eyes. These deep vascular diseases included multisite deep capillary hemangiomas in 15 cases, cranial-facial hemangioma syndrome in 4, arteriovenous malformation in 3, persistent intracranial artery sinus in 2, and varicosity and bone hypertrophy syndrome in 1. Conclusion MRI is of great value to the diagnosis of deep vascular diseases in children with superficial vascular diseases.