Unusual Presentation of Dual Left Atrial Masses Including Pulmonary Vein Involvement: A Rare Spindle Cell Sarcoma

Primary cardiac spindle cell sarcoma is a rare, aggressive tumor with poor prognosis. An 82-year-old woman presented with dizziness and was found to have two left atrial masses. After resection and no initial metastasis, she developed widespread delayed metastases and died 279 days post-op. Even after successful resection with clear margins and no metastasis, vigilant follow-up and multidisciplinary care are crucial for management.