# Unveiling the mystery: a rare case of localized malignant pericardial mesothelioma—case report

## TL;DR

This paper presents a rare case of localized malignant pericardial mesothelioma and highlights the importance of timely diagnosis for better outcomes.

## Contribution

The novelty lies in reporting a rare localized case and describing a diagnostic method for this challenging disease.

## Key findings

- Localized PMPM can have clear edges and be surgically resectable.
- Timely diagnosis is crucial for improving prognosis in PMPM cases.
- The case emphasizes the difficulty in diagnosing this rare tumor.

## Abstract

Primary malignant pericardial mesothelioma (PMPM) is a rare pericardial malignant tumor. Most manifestations of PMPM are localized or diffuse masses surrounding the heart. The prognosis of diffuse PMPM is poor due to the difficulty of surgical resection. Although the edge of localized PMPM is clear and can be easily resected, the diagnosis of this disease is difficult. Timely diagnosis and proper treatment are key to a good prognosis. Here, we report a patient with localized PMPM and describe the method for the diagnosis of this disease.