Mediastinal Mass Revealed by Thyrotoxicosis Crisis. Be Aware of Thymic Hyperplasia. A Case Report

Introduction: Thymic hyperplasia (TH) is a rare condition that includes tumor-like syndrome of the upper mediastinum and GRAVE’S disease (GD). Chest discomfort, shortness of breath, upper chest pain associated with thyrotoxicosis symptoms can be misleading namely in an emergency setting. Case Report: A 30-year-old female patient presented with sinusal tachycardia >100/min, and oppression thoracic signs. MDCT of the chest ruled out pulmonary embolism and disclosed a thymic mass, in a clinical context of GD. Conclusions: Thyroid hormones and auto immunity play a crucial role in TH. General physicians should be aware of this association to avoid aggressive management, namely surgical intervention, along with its associated potential complications and costs.