Two cases of retained medullary cord running parallel to a terminal lipoma

Ai Kurogi, Nobuya Murakami, Takato Morioka, Nobutaka Mukae, Takafumi Shimogawa, Kyoko Kudo, Satoshi O. Suzuki, Masahiro Mizoguchi

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)

抄録

Background: Retained medullary cord (RMC) is a newly defined entity believed to originate from the late arrest of secondary neurulation. Some RMCs contain varying amounts of lipomatous tissues, which need to be differentiated from spinal lipomas, such as filar and caudal lipomas (terminal lipomas). Case Description: We surgically treated two patients with a nonfunctional cord-like structure (C-LS) that was continuous from the cord and extended to the dural cul-de-sac, and ran parallel to the terminal lipoma. In both cases, untethering surgery was performed by resecting the C-LS with lipoma as a column, under intraoperative neurophysiological monitoring. Histopathological examination confirmed that the central canal-like ependyma-lined lumen with surrounding neuroglial and fibrocollagenous tissues, which is the central histopathological feature of an RMC, was located on the unilateral side of the resected column, while the fibroadipose tissues of the lipoma were located on the contralateral side. Conclusion: Our findings support the idea proposed by Pang et al. that entities such as RMC and terminal lipomas are members of a continuum of regression failure occurring during late secondary neurulation, and the coexistence of RMC and terminal lipoma is not a surprising finding. Therefore, it may be difficult in clinical practice to make a distinct diagnosis between these two entities.

本文言語英語
論文番号A17
ジャーナルSurgical Neurology International
12
DOI
出版ステータス出版済み - 3 24 2021

All Science Journal Classification (ASJC) codes

  • 外科
  • 臨床神経学

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