Thomas, MilesPeterson, Christopher J.Mazin, Lauren N.Rawlins, Jonas2024-09-192024-09-192023-122168-8184PMC10788095https://hdl.handle.net/10919/121162Lemierre syndrome is characterized by thrombophlebitis of the internal jugular vein (IJV) secondary to bacterial pharyngitis or tonsillitis. Though antibiotic use has made this a rarer syndrome, it can nevertheless manifest in patients presenting with pharyngitis. Herein, we describe a 20-year-old male patient with no relevant medical history presenting with signs concerning for pneumonia and was ultimately diagnosed with Lemierre syndrome with <i>Streptococcus constellatus</i> bacteremia. Complications included IJV thrombus with presumed septic emboli to the lungs. The patient was discharged on ampicillin/sulbactam with plans to transition to amoxicillin/clavulanate.application/pdfenCreative Commons Attribution 4.0 InternationalbacteremiaLemierre syndromepulmonary emboliseptic thrombophlebitisstreptococcus constellatusArticlehttps://doi.org/10.7759/cureus.505801512382221672168-8184