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Parathyroid carcinoma is a rare malignant neoplasm resulting in parathyroid adenoma to carcinoma progression.〔Hu MI, Vassilopoulou-Sellin R, Lustig R, Lamont JP. ("Thyroid and Parathyroid Cancers" ) in Pazdur R, Wagman LD, Camphausen KA, Hoskins WJ (Eds) (Cancer Management: A Multidisciplinary Approach ). 11 ed. 2008.〕 It forms in tissues of one or more of the parathyroid glands (four pea-sized glands in the neck that make parathyroid hormone, which helps the body store and use calcium). It is rare, and much less common than parathyroid adenoma. It can be difficult to excise.〔(【引用サイトリンク】title=Endocrine Pathology )〕 ==Risk factors== Parathyroid cancer occurs in midlife at the same rate in men and women. Conditions that appear to result in an increased risk of parathyroid cancer include multiple endocrine neoplasia type 1,〔(Parathyroid Cancer Treatment ) at National Cancer Institute. Last Modified: 03/11/2009.〕 autosomal dominant familial isolated hyperparathyroidism〔 and hyperparathyroidism-jaw tumor syndrome〔 (which also is hereditary).〔 Parathyroid cancer has also been associated with external radiation exposure, but, most reports describe an association between radiation and the more common parathyroid adenoma.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Parathyroid carcinoma」の詳細全文を読む スポンサード リンク
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