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. 2019 Jul 31;9:72. doi: 10.1186/s13550-019-0544-3

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 1 — Example of a positive ¹⁸F-fluorocholine PET/CT representing a double parathyroid adenoma. Serum calcium level in this patient was 2.61 mmol/L with a parathyroid hormone level of 27.7 pmol/L. The maximum intensity projection image (a) shows two foci of intense choline uptake in the neck and physiological uptake in the salivary glands, thyroid gland, liver, spleen, and bone marrow. Axial views of PET and CT show foci suspicious for parathyroid adenomas located dorsocranial to the left thyroid lobe (b, c, dimensions 7 × 5 mm and SUV_max of 8.7) and inferior to the right thyroid lobe (d, e, dimensions 6 × 4 mm and SUV_max of 5.6)