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Massive thymoma of the mid-posterior mediastinum: an unprecedented case in a young adult* * Study conducted in the Department of Radiology and Diagnostic Imaging at the Universidade Federal do Triângulo Mineiro (UFTM), Uberaba, MG, Brazil.

Abstract

We report an unprecedented case of ectopic thymoma in a young adult. A 33-year-old male presented with a 10-day history of non-productive cough and fever. Investigation revealed mediastinal widening without pulmonary involvement. Computed tomography showed a large mass-14.8 × 10.8 × 8.4 cm-in the mid-posterior mediastinum, and a biopsy obtained by video-assisted thoracoscopy indicated that the mass was a tumor. Immunohistochemistry showed combined thymoma type AB1. Because of the considerable proportions of the tumor and its close proximity to major structures, the patient was treated with chemotherapy.

Keywords:
Thymoma; Middle mediastinum; Posterior mediastinum; Ectopic tumor

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