# Case report: primary pericardial tumour—challenges in imaging diagnosis and management

## TL;DR

A rare case of primary pericardial tumor is presented, emphasizing diagnostic challenges and the importance of multidisciplinary care.

## Contribution

This case report adds to the limited literature on primary pericardial tumors by highlighting diagnostic and management complexities.

## Key findings

- A 62-year-old female presented with symptoms leading to the discovery of a pericardial mass involving the pulmonary artery.
- Multimodal imaging and histopathology were crucial in diagnosing a suspected primary pericardial sarcoma.
- The case underscores the need for cardiology and oncology collaboration in managing such rare tumors.

## Abstract

Primary pericardial tumours are exceedingly rare and frequently misdiagnosed due to nonspecific clinical presentations. They may initially manifest through cardiovascular complications such as pericardial effusion, arrhythmias, or embolic events, creating significant diagnostic and management challenges.

We report a 62-year-old female with a history of dyslipidaemia who was admitted for progressive dyspnoea, mild chest pain, and palpitations. Cardiovascular evaluation revealed new-onset atrial fibrillation, large pericardial effusion, and bilateral pleural effusions. Transthoracic echocardiography and contrast-enhanced computed tomography identified a heterogeneous pericardial mass with invasive features involving the pulmonary artery, complicated by pulmonary artery obstruction. The patient developed cardiac tamponade requiring emergent pericardiocentesis, which drained 550 mL of serous fluid. Cytological analysis of the pericardial fluid suggested a malignant mesenchymal tumour, and subsequent CT-guided biopsy raised strong suspicion for a primary pericardial sarcoma, pending immunohistochemical confirmation. The patient was managed with anticoagulation, rate control for atrial fibrillation, supportive therapy, and multidisciplinary consultation, leading to a planned oncologic treatment strategy.

This case highlights the pivotal role of cardiology in recognizing occult malignancy presenting with acute cardiovascular manifestations, the diagnostic complexity of primary pericardial tumours, and the importance of multimodal imaging, histopathology, and multidisciplinary collaboration in emergency and long-term management.