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Micronodular Thymoma with Lymphoid Stroma: A Mediastinal Mass Masquerading as a Pericardial Mass

A 61-year-old man presented to the emergency room with lower extremity edema. Physical exam was only remarkable for a diastolic murmur in the right carotid area and left lower extremity edema. Venous Doppler revealed a deep venous thrombosis in the left lower extremity. Chest computed tomography (CT...

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Autores principales: Swimley, Kent, Gonzalez-Bonilla, Hilda M., Senapati, Alpana, Kurrelmeyer, Karla M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Houston Methodist DeBakey Heart & Vascular Center 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8588750/
https://www.ncbi.nlm.nih.gov/pubmed/34824674
http://dx.doi.org/10.14797/mdcvj.516
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author Swimley, Kent
Gonzalez-Bonilla, Hilda M.
Senapati, Alpana
Kurrelmeyer, Karla M.
author_facet Swimley, Kent
Gonzalez-Bonilla, Hilda M.
Senapati, Alpana
Kurrelmeyer, Karla M.
author_sort Swimley, Kent
collection PubMed
description A 61-year-old man presented to the emergency room with lower extremity edema. Physical exam was only remarkable for a diastolic murmur in the right carotid area and left lower extremity edema. Venous Doppler revealed a deep venous thrombosis in the left lower extremity. Chest computed tomography (CT) with intravenous contrast ruled out pulmonary embolism but showed a mediastinal mass adjacent to the pericardium. Further imaging with cardiac magnetic resonance imaging (CMR) and cardiac CT angiography (CCTA) enabled localization and evaluation of the structural characteristics of the mass. The decision was made to excise the mass due to increasing size compared with its measurements on prior chest CTs and a high degree of vascularization seen on CMR and CCTA, which was concerning for an enlarging arteriovenous malformation or a hemangioma. However, histopathologic analysis of the mass revealed it to be a micronodular thymoma.
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spelling pubmed-85887502021-11-24 Micronodular Thymoma with Lymphoid Stroma: A Mediastinal Mass Masquerading as a Pericardial Mass Swimley, Kent Gonzalez-Bonilla, Hilda M. Senapati, Alpana Kurrelmeyer, Karla M. Methodist Debakey Cardiovasc J Case Report A 61-year-old man presented to the emergency room with lower extremity edema. Physical exam was only remarkable for a diastolic murmur in the right carotid area and left lower extremity edema. Venous Doppler revealed a deep venous thrombosis in the left lower extremity. Chest computed tomography (CT) with intravenous contrast ruled out pulmonary embolism but showed a mediastinal mass adjacent to the pericardium. Further imaging with cardiac magnetic resonance imaging (CMR) and cardiac CT angiography (CCTA) enabled localization and evaluation of the structural characteristics of the mass. The decision was made to excise the mass due to increasing size compared with its measurements on prior chest CTs and a high degree of vascularization seen on CMR and CCTA, which was concerning for an enlarging arteriovenous malformation or a hemangioma. However, histopathologic analysis of the mass revealed it to be a micronodular thymoma. Houston Methodist DeBakey Heart & Vascular Center 2021-10-19 /pmc/articles/PMC8588750/ /pubmed/34824674 http://dx.doi.org/10.14797/mdcvj.516 Text en Copyright: © 2021 The Author(s) https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See http://creativecommons.org/licenses/by/4.0/.
spellingShingle Case Report
Swimley, Kent
Gonzalez-Bonilla, Hilda M.
Senapati, Alpana
Kurrelmeyer, Karla M.
Micronodular Thymoma with Lymphoid Stroma: A Mediastinal Mass Masquerading as a Pericardial Mass
title Micronodular Thymoma with Lymphoid Stroma: A Mediastinal Mass Masquerading as a Pericardial Mass
title_full Micronodular Thymoma with Lymphoid Stroma: A Mediastinal Mass Masquerading as a Pericardial Mass
title_fullStr Micronodular Thymoma with Lymphoid Stroma: A Mediastinal Mass Masquerading as a Pericardial Mass
title_full_unstemmed Micronodular Thymoma with Lymphoid Stroma: A Mediastinal Mass Masquerading as a Pericardial Mass
title_short Micronodular Thymoma with Lymphoid Stroma: A Mediastinal Mass Masquerading as a Pericardial Mass
title_sort micronodular thymoma with lymphoid stroma: a mediastinal mass masquerading as a pericardial mass
topic Case Report
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8588750/
https://www.ncbi.nlm.nih.gov/pubmed/34824674
http://dx.doi.org/10.14797/mdcvj.516
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