儿童期脑外动静脉畸形的CT评估价值

目的:分析儿童期脑外动静脉畸形的临床特点及计算机断层扫描（CT）影像表现，探讨CT增强检查对儿童期脑外动静脉畸形介入治疗前的评估价值。 方法:回顾性分析47例经数字减影血管造影确诊的儿童期脑外动静脉畸形患者的临床及CT影像资料，对部位、形态、边界、血管构筑和骨的侵犯等表现进行分析。 结果:病变位于胸壁1例，腹盆壁3例，四肢7例，口腔颌面部29例，耳部3例，眼眶1例，鼻部1例，头皮2例，伴有骨质受累5例。临床呈高流量的血管畸形表现，症状反复或进行性加重。特征性CT表现为强化的畸形血管团、粗大扭曲的引流静脉、增粗的供血动脉。 结论:CT增强检查能准确显示动静脉畸形的畸形血管团、大部分供血动脉及引流静脉，是介入治疗前的有效评估方法。

Value of CT examination for peripheral arteriovenous malformation in children

Abstract: Objective To analyze the clinical features and computed tomography (CT) imaging features of peripheral arteriovenous malformations (AVM) in children, and to explore the value of CT enhanced examination before interventional therapy for peripheral AVM. Methods The clinical and imaging data of 47 children with peripheral AVM diagnosed by digital subtraction angiography were analyzed retrospectively, and the manifestations, including location, morphology, boundary, vascular architecture and bone invasion, were analyzed. Results The lesion was located at chest wall in 1 case, abdominal or pelvic wall in 3 cases, limbs in 7 cases, oral and maxillofacial region in 29 cases, aural region in 3 cases, orbit in 1 case, nose in 1 case, and scalp in 2 cases. Of 47 cases, 5 cases were accompanied with bone involvement. Peripheral AVM was characterized by high-flow vascular malformation, and symptoms were repeated or progressively aggravated. The specific CT signs included enhanced malformed vascular mass, large and distorted draining veins, and thick feeding arteries. Conclusion CT enhanced examination which can accurately display the malformed vessels, most of feeding arteries and draining veins is an effective evaluation method before interventional therapy.