著明な石灰化を伴う腎神経鞘腫の1例

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39歳女性.患者は,検診の上部消化管造影検査にて右腎の異常石灰化を指摘され,CTにて右腎上極に径8cmの著明な石灰化を伴う充実性腫瘍が認められた.MRIではT2強調画像で腎実質より軽度高信号を呈し,18F-fluorodeoxyglucoseを用いたPETは陰性であった.以上より,腎癌の診断で根治的腎摘除術を施行した結果,組織学的には典型的な神経鞘腫で免疫染色にてS-100蛋白陽性であったSchwannoma arising from the kidney is a rare benign tumor, with only 20 cases reported in the English literature. We encountered a histopathologically typical Schwannoma of the kidney in a 39-year-old woman, which was characterized by marked calcification. Radical nephrectomy was performed under the diagnosis of renal cell carcinoma. The 21 reported cases of schwannoma of the kidney, including the present case, are reviewed in detail.
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