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©The Author(s) 2026. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Feb 16, 2026; 14(5): 117016
Published online Feb 16, 2026. doi: 10.12998/wjcc.v14.i5.117016
Published online Feb 16, 2026. doi: 10.12998/wjcc.v14.i5.117016
Thyroid collision tumor and Graves’ disease: A case report and review of literature
Mauricio Alvarez, Oswaldo Rincon, Isaac Guzman, Department of Endocrinology, Hospital Militar Central, Bogota 110221, Distrito Capital de Bogotá, Colombia
Maria Luna, Pedro Mancera, Department of Endocrinology, Universidad Militar Nueva Granada, Bogota 110221, Colombia
Elkin Suarez, Internal Medicine Program, Universidad Militar Nueva Granada, Bogota 250001, Bogotá, Colombia
Author contributions: Luna M conceived the study and wrote the paper; Suarez E, Rincon O, Guzman I, and Mancera P contributed to the writing of the paper; Alvarez M conceived the study and wrote the paper.
Informed consent statement: Written informed consent was obtained from the patient using the hospital’s official institutional format, authorizing the publication of this case report and any accompanying images.
Conflict-of-interest statement: The authors declare that there are no conflicts of interest regarding the publication of this article.
CARE Checklist (2016) statement: The authors have read the CARE Checklist (2016), and the manuscript was prepared and revised according to the CARE Checklist (2016).
Open Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Mauricio Alvarez, Department of Endocrinology, Hospital Militar Central, Tv. 3C No. 49-02, Bogota 110221, Distrito Capital de Bogotá, Colombia.
Received: November 26, 2025
Revised: December 20, 2025
Accepted: January 16, 2026
Published online: February 16, 2026
Processing time: 76 Days and 0.7 Hours
Revised: December 20, 2025
Accepted: January 16, 2026
Published online: February 16, 2026
Processing time: 76 Days and 0.7 Hours
Core Tip
Core Tip: Collision tumors of the thyroid are rare entities, characterized by the presence of two histologically distinct tumors within the same organ, separated by normal intervening tissue. Graves’ disease is a well-established risk factor for papillary thyroid cancer but has not been associated with thyroid collision tumors or medullary thyroid carcinoma. In this review, we evaluate the available evidence on thyroid collision tumors.