INTRODUCTION Abdominal pseudocysts comprising cerebrospinal fluid are an uncommon but significant complication in patients with ventriculoperitoneal shunt. We present a successfully treated 12-year-old boy with a history of ventriculoperitoneal shunting and a huge abdominal cerebrospinal fluid pseudocyst. CASE PRESENTATION A12-year-old Japanese boy presented with a deteriorated consciousness and a palpable and elastic large lower abdominal mass. Computed tomography of his abdomen demonstrated a collection of homogenous low-density fluid near the catheter tip of the ventriculoperitoneal shunt. Cerebral computed tomography revealed an increased ventricular size. Based on the clinical diagnosis of abdominal pseudocyst, the peritoneal shunt catheter was secured and divided into two parts by cutting it on the chest; then, the proximal side of the peritoneal shunt catheter was externalized for extraventricular drainage. The cyst was percutaneously aspirated with ultrasound guidance, and the distal side of the peritoneal shunt catheter was removed. The distal side of the peritoneal shunt catheter was reinserted in another position into his abdomen after 3-week extraventricular drainage management. CONCLUSION Emergency physicians should know about this potential complication as an important differential diagnosis resulting from acute abdominal complaints in patients with ventriculoperitoneal shunts.

中文翻译：

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脑室腹腔分流后巨大的腹腔脑脊液假性囊肿：一例报道。

引言对于脑腹腔分流患者，包含脑脊液的腹部假性囊肿是一种罕见但重要的并发症。我们介绍了一个成功治疗的12岁男孩，有脑室腹膜分流史和巨大的腹部脑脊液假性囊肿。病例介绍一名12岁的日本男孩表现出意识减退和明显而有弹性的下腹部巨大肿块。他的腹部计算机断层扫描显示，在室腹膜分流的导管末端附近收集了均匀的低密度液体。脑电脑断层扫描显示脑室大小增加。根据腹部假性囊肿的临床诊断，将腹膜分流导管固定并在胸腔上切成两半。然后，腹膜分流导管的近侧向外进行脑室引流。在超声引导下经皮吸出囊肿，并取下腹膜分流导管的远端。经3周的室外引流处理后，将腹膜分流导管的远端侧重新插入他的腹部。结论急诊医师应将这种潜在的并发症作为心腹腹腔分流患者因急性腹部不适而引起的重要鉴别诊断。经3周的室外引流处理后，将腹膜分流导管的远端侧重新插入他的腹部。结论急诊医师应将这种潜在的并发症作为心腹腹腔分流患者因急性腹部不适而引起的重要鉴别诊断。经3周的室外引流处理后，将腹膜分流导管的远端侧重新插入他的腹部。结论急诊医师应将这种潜在的并发症作为心腹腹腔分流患者因急性腹部不适而引起的重要鉴别诊断。