# Atypical Thymic Carcinoid Presenting as a Mediastinal Mass: A Case Report

## TL;DR

A 70-year-old man had surgery for a chest mass, later diagnosed as a rare aggressive thymic tumor.

## Contribution

This case report adds to the limited literature on thymic atypical carcinoid tumors and their clinical presentation.

## Key findings

- The patient was initially diagnosed with thymoma but was found to have a thymic atypical carcinoid tumor.
- Thymic atypical carcinoid tumors are rare and tend to behave aggressively compared to similar tumors in other organs.

## Abstract

Thymic neuroendocrine tumors are extremely rare and have generally been reported in the literature as individual case reports. Unlike their counterparts in other organs, thymic atypical carcinoid tumors usually exhibit aggressive behavior. Complete surgical resection is the recommended treatment. Herein, we present the case of a 70-year-old male patient who underwent surgery with a preliminary diagnosis of thymoma due to an anterior mediastinal mass and whose pathology was reported as a thymic atypical carcinoid tumor.