A Case of Pediatric Retroperitoneal Schwannoma Presenting with Myoclonus of the Lower Limb: A Case Report and Review.

IF 0.7 Q4 SURGERY
Surgical Case Reports Pub Date : 2025-01-01 Epub Date: 2025-03-11 DOI:10.70352/scrj.cr.24-0077
Takazumi Kato, Yuki Sengoku, Shinya Banno, Souji Ibuka, Saori Endo, Michio Ozeki, Yukiko Tani, Naruhiko Murase, Yuta Sato, Itaru Yasufuku, Yu Jesse Tajima, Nobuhisa Matsuhashi
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Abstract

Introduction: Schwannomas arise from Schwann cells of the peripheral nerve sheath. Schwannomas are usually benign, and most of them are located in the head, neck, or distal extremities. The retroperitoneal region is an unusual location for schwannomas. Schwannomas are usually seen in adults and are very rare in the pediatric population.

Case presentation: A 6-year-old boy was referred to our institution with a right abdominal mass. His main complaint was intermittent myoclonus of his right lower limb. Abdominal computed tomography (CT) and magnetic resonance imaging scans revealed a round-shaped solid mass measuring 78 × 61 mm adjacent to the caudal side of the right kidney. Right hydronephrosis and hydroureters resulting from ureteral compression were present. A positron emission tomography-CT scan showed mild accumulation of fluorodeoxyglucose. Tumor resection was performed by laparotomy, and the mass was completely excised. Postoperative pathologic examination showed a benign schwannoma. The myoclonus of the right lower limb that had been present before surgery disappeared after surgery. At 9 months since the operation, there has been no recurrence.

Conclusions: We present a pediatric case of a retroperitoneal schwannoma causing myoclonus of the lower limb. Retroperitoneal schwannomas in children are extremely rare, with only 4 cases having been reported in English.

以下肢肌阵挛为表现的小儿腹膜后神经鞘瘤1例报告及复习。
神经鞘瘤起源于周围神经鞘的雪旺细胞。神经鞘瘤通常是良性的,大多数位于头部、颈部或远端肢体。腹膜后区域是神经鞘瘤的罕见部位。神经鞘瘤通常见于成人,在儿科人群中非常罕见。病例介绍:一名六岁男童因右腹部肿块转介至本院。他的主诉是右下肢间歇性肌阵挛。腹部计算机断层扫描(CT)和磁共振成像扫描显示右肾尾端附近有一个圆形固体肿块,大小为78 × 61 mm。右侧肾积水及输尿管受压所致输尿管积水。正电子发射断层扫描显示轻度氟脱氧葡萄糖积聚。经剖腹手术切除肿瘤,肿块完全切除。术后病理检查显示为良性神经鞘瘤。术前存在的右下肢肌阵挛术后消失。术后9个月无复发。结论:我们报告一例小儿腹膜后神经鞘瘤引起下肢肌阵挛。儿童腹膜后神经鞘瘤极为罕见,英文文献仅报道4例。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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审稿时长
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