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Ectopic atypical parathyroid lipoadenoma: a rare cause of severe primary hyperparathyroidism

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Abstract

Parathyroid lipoadenomas are a rare and benign variant of parathyroid adenomas that are defined morphologically by an abundance of fat cells. They may be functional with secretion of parathyroid hormone or nonfunctional. We present a case of a parathyroid lipoadenoma in a patient presenting with clinical manifestations of severe primary hyperparathyroidism. Unusual features in this case included the ectopic location of the lipoadenoma in the mediastinum, the significant size of 6.6 × 3.4 cm, and weight of 30.1 g. In addition to the large size of this generally benign type of parathyroid neoplasm, histologic findings included focal band-forming fibrosis compatible with the diagnosis of an atypical parathyroid adenoma. In conclusion, this case illustrates a difficult case of an ectopic functioning parathyroid lipoadenoma with chronic sequelae due to severe hyperparathyroidism.

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Conflict of interest

All authors have no conflict of interest.

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Authors and Affiliations

  1. The Charles and Jane Pak Center for Mineral Metabolism and Clinical Research and Department of Internal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX, 75390-8885, USA

    Vivienne Yoon & Naim M. Maalouf

  2. Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA

    Kristina Treat

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  1. Vivienne Yoon
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  2. Kristina Treat
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  3. Naim M. Maalouf
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Correspondence to Naim M. Maalouf.

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Yoon, V., Treat, K. & Maalouf, N.M. Ectopic atypical parathyroid lipoadenoma: a rare cause of severe primary hyperparathyroidism. J Bone Miner Metab 31, 595–600 (2013). https://doi.org/10.1007/s00774-012-0416-7

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  • DOI: https://doi.org/10.1007/s00774-012-0416-7

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