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J Radiol. 2009 Mar;90(3 Pt 2):409-12.

[Hyperparathyroidism: CT and MR findings].

[Article in French]

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Service de Radiologie, Hôpital Huriez, CHRU de Lille, 1 rue Polonovski, 59037 Lille cedex, France.


3-Phase contrast material enhanced CT provides great sensitivity for accurate localization of hyperfunctioning parathyroid glands. Density measurements can assist in differentiating adenomas from lymph nodes and normal thyroid tissue. The spontaneous attenuation of parathyroid adenomas is lower than 80 HU, whereas the density of normal thyroid tissue is above 80 HU. Forty five seconds after contrast injection, adenomas have a density>130 HU, whereas lymph nodes have a density<130 HU. Furthermore, between 45 and 70 seconds after injection, the attenuation of parathyroid adenomas decreases (>20UH) whereas the attenuation of lymph nodes increases.

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