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急性の頚部痛を来し,保存療法で石灰化の消退をみた環椎石灰沈着症の1例を経験した.症例は61歳の女性で,誘因なく急性頚部痛を発症し当院を受診した.CTで環椎脊柱管内に孤立性の涙痕様の石灰陰影を認めた.NSAIDsの内服のみで症状は軽快し,4カ月後のCTで石灰化は消失した.脊柱管内に石灰化を来す疾患では偽痛風関連疾患の報告が散見されるが,今回のように比較的大きな石灰化巣が孤立性に存在し,自然消失することは稀である.急性頚部痛の鑑別には多くの疾患が挙げられるが,偽痛風関連病態でも生じることを銘記しておく必要がある.
We report a case of acute neck pain caused by calcium deposition in the vicinity of the atlas. The patient was a 61-year-old woman who came to our clinic with acute neck pain. A CT scan demonstrated isolated a calcium deposit in the spinal canal at the C1 level. The calcium deposit had a teardrop shape and measured 10mm×5mm. The symptom resolved in response to conservative therapy with oral NSAID. The calcified mass vanished four months later. Pseudogout-related disease shoud be included in the differential diagnosis of acute neck pain.
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