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. 2022 Jan 31;12:794988. doi: 10.3389/fendo.2021.794988

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Copyright © 2022 Roukain, Alwan, Bongiovanni, Sykiotis and Kopp

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Original histology showing the main mass (arrow) and tumoral nests (*) that extend into the adipose tissue. This invasion, together with vascular invasion, mitotic figures, and necrosis is indicative for a low-grade parathyroid carcinoma (hematoxylin & eosin staining, 40X). (B, C) Cervical computed tomography demonstrating a right retro-tracheal mass of 15.9 x 12.9 x 7.5 mm corresponding to local recurrence of the incompletely resected parathyroid carcinoma.