Ependyma-Lined Canal with Surrounding Neuroglial Tissues in Lumbosacral Lipomatous Malformations: Relationship with Retained Medullary Cord

Pediatric Neurosurgery - Tập 53 Số 6 - Trang 387-394 - 2018
Nobuya Murakami1, Takato Morioka1, Takafumi Shimogawa1,2, Nobutaka Mukae2, Satoshi Inoha3, Takakazu Sasaguri4, Satoshi Suzuki5, Koji Iihara2
1Department of Neurosurgery, Fukuoka Children’s Hospital, Fukuoka, Japan
2Department of Neurosurgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
3Department of Neurosurgery, Japan Community Health Care Organization (JCHO), Kyushu Hospital, Kitakyushu, Japan
4Department of Pathology, Japan Community Health Care Organization (JCHO), Kyushu Hospital, Kitakyushu, Japan
5Department of Neuropathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan

Tóm tắt

<b><i>Background:</i></b> An ependyma-lined canal with surrounding neuroglial tissues can be present in lumbosacral lipomatous malformations; however, the precise embryological significance is still unclear. <b><i>Method:</i></b> Six out of 50 patients with lipomatous malformations had ependymal structures. We retrospectively analyzed the clinical, neuroradiological, and histological findings of these patients to demonstrate the relationship with the embryological background of the retained medullary cord (RMC), which normally regresses, but was retained here because of late arrest of secondary neurulation. <b><i>Results:</i></b> Five (13.9%) of 36 patients with filar and caudal types and 1 of 3 lipomyelomeningoceles had ependymal structures, while none with dorsal and transitional types had these tissues. Histologically, the ependymal structures surrounded by neuroglial tissue and containing various amounts of adipose tissue bear a striking resemblance to the ependymal structures in RMC. <b><i>Conclusion:</i></b> The 13.9% incidence of association between the ependymal structures and filar and caudal types is thought to be because of second ary neurulation failure with the same embryological background as that of RMC. Dorsal and transitional types, resulting from primary neurulation failure, therefore, did not have ependymal structures.

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Thông tin xuất bản

Pediatric Neurosurgery

Tập 53 Số 6

387-394

Thông tin tác giả