Nonbacterial Thrombotic Endocarditis of the Mitral Valve With Echocardiographic Appearances Mimicking a Papillary Fibroelastoma in a Middle-Aged Female Patient.

Papillary fibroelastoma (PFE) and nonbacterial thrombotic endocarditis (NBTE) account for <1% of all cardioembolic strokes. When there is no evidence of infection, and an exophytic valve lesion is seen on echocardiography, PFE may be an initial imaging diagnosis. NBTE, or Libman-Sacks endocarditis, is a rare entity and can present with varied imaging findings.

Symptomatic pericardial effusion in the setting of asymptomatic COVID-19 infection: A case report.

Rationale: Infection with the severe acute respiratory coronavirus disease 2019 (COVID-19) has been shown to cause multi-organ involvement including cardiopulmonary serosal layers infection and inflammation. As a result, pericarditis and pericardial effusion may occur with or without COVID-19 related respiratory signs. Due to limitations in sensitivity and specificity of current COVID-19 diagnostic studies, cases that trigger high clinical intuition, even with negative serologic and polymerase chain reaction testing results, may necessitate further diagnostic workup to discover the underlying etiology.