16 August 2026
: Case report 
Severe Tricuspid Regurgitation: Traumatic Papillary Muscle Rupture Mimicking Infective Endocarditis—A Case Report
Challenging differential diagnosis, Management of emergency care, Rare disease
Soichiro Kobayashi E 1,2, Taku Omori
E 1*, Daisuke Izumi E 2,3, Toshiya Tokui E 4, Atsunobu Kasai E 2, Kaoru Dohi E 1
DOI: 10.12659/AJCR.952267
Am J Case Rep 2026; 27:e952267
Figure 1 Chest X-ray and computed tomography findings in the emergency department.Computed tomography revealed the fracture of the left seventh rib (A, B), and chest X-ray revealed mild cardiomegaly without pleural effusion or pulmonary congestion (C). A red arrow and a circle indicate the fracture site.