Related Experiment Video
Updated: Jun 8, 2026

Fully Endoscopic Mitral Valve Repair with Percutaneous Cannulation of Groin Vessels
Published on: May 26, 2023
Monophasic synovial sarcoma presenting as mitral valve obstruction.
Warangkana Chokesuwattanaskul1, Jason Terrell, Leigh Ann Jenkins
1Department of Cardiology, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, USA.
A rare monophasic synovial sarcoma metastasized to the left atrium, causing mitral valve obstruction. This case highlights the importance of considering unusual presentations of sarcoma in cardiac tumors.
Area of Science:
- Cardiology
- Oncology
- Thoracic Surgery
Background:
- Synovial sarcoma is a rare soft tissue tumor.
- Cardiac involvement by synovial sarcoma is exceptionally uncommon.
Observation:
- A 26-year-old man presented with chest pain and near-syncope.
- Imaging revealed large left lung masses and a 5-cm left atrial mass.
- The atrial mass infiltrated the pulmonary vein and prolapsed into the mitral valve.
Findings:
- Surgical excision of the left atrial tumor was performed.
- Pathologic evaluation confirmed monophasic synovial sarcoma.
- This represents the third reported case of left atrial invasion by pulmonary vein-infiltrating synovial sarcoma.
Implications:
- This is the first documented case of metastatic left atrial synovial sarcoma in monophasic form.
- Highlights the potential for synovial sarcoma to present as a cardiac mass.
- Underscores the need for comprehensive diagnostic workup in cases of unexplained cardiac masses and pulmonary tumors.
Related Concept Videos
Mitral Stenosis I: Introduction
Mitral Valve Prolapse I: Introduction
Mitral Stenosis II: Clinical features and Diagnostic Tests
Mitral Valve Prolapse II: Assessment and Management
Mitral Regurgitation I: Introduction
Mitral Stenosis III: Medical Management
