# A Case of Pericostal Tuberculosis Discovered Incidentally on an Abdominal MRI

## TL;DR

A rare case of pericostal tuberculosis was discovered incidentally during an abdominal MRI and confirmed through thoracoscopic resection.

## Contribution

Highlights pericostal tuberculosis as a rare differential diagnosis for pleural tumors based on MRI features.

## Key findings

- A mobile pleural mass was detected incidentally on an abdominal MRI.
- Thoracoscopic resection confirmed pericostal tuberculosis with PCR-positive Mycobacterium tuberculosis.

## Abstract

A mobile pleural mass on an MRI was incidentally detected in a 45‐year‐old woman. Thoracoscopic resection revealed caseous necrosis and PCR‐confirmed
Mycobacterium tuberculosis
, leading to a diagnosis of pericostal tuberculosis. This rare case emphasises considering pericostal tuberculosis in the differential diagnosis of pleural tumours if there are suspicious MRI features.

A mobile pleural mass on an MRI was incidentally detected in a 45‐year‐old woman. Thoracoscopic resection revealed pericostal tuberculosis with PCR‐positive
Mycobacterium tuberculosis
. This rare case emphasizes considering pericostal tuberculosis in the differential diagnosis of pleural tumors if there are suspicious MRI features.