# Ectopic Thyroid Tissue in the Anterior Mediastinum: A Case Report

## TL;DR

This case report describes a rare instance of thyroid tissue found in an unusual location in the chest and discusses its possible treatment options.

## Contribution

The novelty lies in presenting a specific clinical case of ectopic thyroid tissue in the anterior mediastinum and reviewing its management.

## Key findings

- Ectopic thyroid tissue was found during the resection of an anterior mediastinal mass.
- Management options include iodine administration or surgical resection based on tissue location and activity.

## Abstract

Ectopic thyroid tissue (ETT) is a rare finding on mediastinoscopy which could be attributed to a defect early in thyroid gland embryogenesis, as the glandular tissue makes its way to a pre-tracheal position. The more distal the location of the ectopic tissue from typically neighboring structures, such as the recurrent laryngeal nerves or the superior thyroid artery, the greater the likelihood for issues such as hyperthyroidism, compression of nearby neurovascular structures, and malignancy. Depending on the exact anatomical location and hormonal activity of the tissue, management can range from administration of iodine to surgical resection. This report discusses a case of ETT discovered during the resection of an anterior mediastinal mass, possible treatment, and management plans.