Left Atrial High-grade Sarcoma With Focal Osteosarcomatous Differentiation.

Area of Science:

• Cardiology
• Oncology
• Pathology

Background:

• Malignant cardiac tumors are rare, with sarcomas being exceptionally uncommon and lacking established management guidelines.
• Primary cardiac sarcomas represent a small fraction of all primary cardiac tumors.

Observation:

• An 85-year-old female presented with shortness of breath and chest pain, found to have a 4 cm left atrial mass via imaging.
• The mass, suspicious for malignancy, was surgically debulked.
• Histopathology revealed a high-grade sarcoma with focal osteosarcomatous differentiation, identified as a cardiac synovial sarcoma.

Findings:

• Cardiac synovial sarcomas are exceedingly rare, accounting for less than 0.1% of primary cardiac tumors.
• This case represents one of fewer than seven reported instances of cardiac synovial sarcoma in the literature.
• The patient's tumor exhibited spindle cell morphology with bone and cartilage formation.

Implications:

• Reporting rare cases like this cardiac synovial sarcoma is vital for advancing medical knowledge due to limited literature.
• Further research and case follow-ups are necessary to understand the behavior and optimal management of this rare condition.
• Highlights the importance of comprehensive histopathological evaluation for diagnosing rare cardiac neoplasms.