Case Report: Concomitant Papillary Fibroelastoma and Non-Bacterial Thrombotic Endocarditis of the Tricuspid Valve in a Patient with Antiphospholipid Antibody Syndrome

Primary cardiac tumors are rare and usually benign. Among these, papillary fibroelastoma is one of the most frequently encountered types. Although often asymptomatic, papillary fibroelastoma can lead some serious embolic complications. This case report presents a 42-year-old male patient diagnosed with antiphospholipid antibody syndrome, who developed nonbacterial thrombotic endocarditis on a tricuspid valve papillary fibroelastoma. Histopathological findings supported a diagnosis of papillary fibroelastoma with coexisting nonbacterial thrombotic endocarditis, This case highlights the association between papillary fibroelastoma and nonbacterial thrombotic endocarditis in the context of antiphospholipid antibody syndrome, emphasizing the importance of clinical vigilance regarding cardiac involvement in rheumatologic diseases and the embolic potential of valvular masses.