Thyroid and parathyroid ectopia in the mediastinum; a case report

IntroductionThere are a variety of diseases that may appear as a mediastinum tumor, occurrence of ectopic parathyroid gland (EPG) and ectopic thyroid tissue (ETT) together in the mediastinum is a very rare entity. This study aims to report a case of associated ectopic thyroid and parathyroid in mediastinum.Case presentationA 67-year-old lady complained of cough for two months aggravated by lying down, relieved by sitting and standing. Chest X-ray showed enlargement of superior mediastinum.

A round non-homogenous, well-defined mass was seen in the superior of mediastinum by computed tomography (CT) scan. The patient underwent thoracotomy and the mass was totally resected. Histological examination revealed ectopic thyroid and parathyroid tissues in the superior mediastinum.Clinical discussionThe major reasons for originating thyroid ectopia in distant sites could be unordinary migration, abnormal …