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A1 Segment Hypoplasia/aplasia Detected by Magnetic Resonance Angiography in Neuropediatric Patients

Other Titles
 소아신경 환아에서 뇌혈관 자기공명 조영술에 의해 발견된 전대뇌동맥 첫번째 분지의 형성저하/무형성 
 Yoon Ki Han  ;  Seung Kim  ;  Heung Dong Kim  ;  Joon Soo Lee  ;  Hoon Chul Kang  ;  Young Mock Lee  ;  Choon Sik Yoon 
 Journal of the Korean Child Neurology Society (대한소아신경학회지), Vol.19(3) : 231-239, 2011 
Journal Title
 Journal of the Korean Child Neurology Society  (대한소아신경학회지) 
Issue Date
PURPOSE: A variation in the circle of Willis is not so common, but the most frequent type is hypoplasia/aplasia of the precommunicating anterior cerebral arteries (A1 segment). We aimed to examine the incidence and the clinical significance of A1 segment hypoplasia/aplasia in neuropediatric patients. METHODS: We retrospectively studied children with A1 segment hypoplasia/aplasia in brain magnetic resonance angiography (MRA) and compared the clinical and radiological aspects between children with A1 segment hypoplasia/aplasia alone and with other variations in the circle of Willis. RESULTS: Among 301 patients, 34 patients (11.3%) had A1 segment hypoplasia/aplasia. They presented neurological symptoms such as chronic headache, dizziness and visual disturbance. Seven (20.6%) had family history of neurological illness. Twenty seven (79.4%) had A1 segment hypoplasia/aplasia only, and seven (20.6%) had another vascular abnormality. Seven (20.6%) showed abnormal brain magnetic resonance angiography (MRI) results, cerebral atrophy being the most frequent (n=5, 14.7%). The incidence of abnormal brain MRI was 11.1% (n=3) in single vascular abnormality and 57.1% (n=4), significantly higher (p-value 0.02) in combined abnormality group. CONCLUSION: Structural alterations in the cerebral vasculature in children have important pathophysiological and clinical implications. Evaluation of variations in the circle of Willis, especially of A1 segment hypoplasia/aplasia using MRA is recommended
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실)
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Pediatrics (소아청소년과학교실)
Yonsei Authors
강훈철(Kang, Hoon Chul) ; 김흥동(Kim, Heung Dong) ; 윤춘식(Yoon, Choon Sik) ; 이영목(Lee, Young Mock) ; 이준수(Lee, Joon Soo) ; 한윤기(Han, Yoon Ki)
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