# Improvement in Recurrent Laryngeal Nerve Paralysis and Tracheal Deviation after Surgical Resection of a Mediastinal Parathyroid Cyst: A Case Report

## TL;DR

A rare case of a mediastinal parathyroid cyst causing nerve paralysis and tracheal deviation improved after surgery.

## Contribution

First documented case showing improvement in nerve paralysis and tracheal deviation after resecting a mediastinal parathyroid cyst.

## Key findings

- Surgical resection improved tracheal deviation and recurrent laryngeal nerve paralysis.
- Long-standing nerve paralysis can improve with timely surgical intervention.
- Preservation of the recurrent laryngeal nerve during surgery is crucial for recovery.

## Abstract

Mediastinal parathyroid cyst is a rare cystic disease that involves the parathyroid tissue within its walls. This case report is the first to document a mediastinal parathyroid cyst with recurrent laryngeal nerve paralysis and tracheal deviation that improved after surgical resection.

A 47-year-old man experienced hoarseness and dyspnea upon exertion for 1 month. Computed tomography revealed a mediastinal cystic lesion with a maximum diameter of 78 mm, compressing the trachea. Laryngofiberscopy suggested long-term left recurrent laryngeal nerve paralysis. Tumor resection was performed while preserving the left recurrent laryngeal nerve. The pathological examination led to the diagnosis of a mediastinal parathyroid cyst. Postoperatively, both tracheal deviation and recurrent laryngeal nerve paralysis improved.

Surgical resection improved the tracheal deviation and recurrent laryngeal nerve paralysis caused by a mediastinal parathyroid cyst. Long-standing recurrent laryngeal nerve paralysis can improve, emphasizing the need for proactive surgical intervention and the importance of careful preservation of the recurrent laryngeal nerve.