# Shining a Special Light on an Unusual Case of Thoracic Lymphadenopathy

## TL;DR

This paper presents a rare case of amyloidosis affecting only the lymph nodes in the chest, with no other lung or pleural involvement.

## Contribution

The novelty lies in documenting an unusual, isolated case of thoracic lymphadenopathy caused by amyloidosis.

## Key findings

- Amyloidosis was diagnosed through biopsy of enlarged thoracic lymph nodes.
- The case was unique due to the absence of pleuropulmonary disease despite pulmonary amyloid involvement.
- This case emphasizes the importance of considering amyloidosis in differential diagnoses of lymphadenopathy.

## Abstract

Amyloidosis is an uncommon disease characterized by the buildup of misfolded protein fibrils outside cells in various tissues. Its diagnosis relies on tissue biopsy confirmation. Due to its diverse clinical presentations, diagnosis is often delayed. The symptoms depend on the organs affected, with the kidney and heart being most frequently involved. Although pulmonary involvement occurs relatively often, it seldom causes symptoms. Pulmonary amyloidosis can manifest as nodular pulmonary amyloidosis, diffuse alveolar-septal amyloidosis, or tracheobronchial amyloidosis. This case highlights a rare incidental finding of isolated amyloid lymphadenopathy without additional pleuropulmonary disease.