頸部黄色靱帯石灰化症の1例

A Case with Myelopathy Caused by Calcified Nodules of Cervical Ligamentum Flavum

I．はじめに

　いわゆる黄色靱帯石灰化症は胸腰部に多く，頸部では比較的稀とされている^{1,2,4,8,17,24）}．

　今回，われわれは頸部脊椎管後部にレ線上石灰化を認め，四肢麻痺を呈した患者にen bloc laminectomyを施行し，症状の改善と切除標本の結晶学的分析結果が得られたので文献的考察を加え報告する．

A case is reported of a 71-year-old female with cer-vical myelopathv caused by calcified nodules in the cer-vical ligamentum flavum and improved by en bloc laminectomy.

The calcified nodules were formed by the deposition of two crystals, hydroxyapatite (HAP) and calcium pyrophosphate dihydrate (CPPD) Light microscopy, scanning electron microscopy, energy dispersive X-ray microanalysis and X-ray diffraction study disclosed that the larger nodule located on the right was composed mainly of HAP in the central part and CPPD in the cir-cumference.