Mitral degenerative valve leaflets suspected as primary valvular tumor: a case report

BACKGROUND: Echocardiography plays an important role in the diagnosis of heart disease. Sometimes, however, it may also provide misdiagnosis information. CASE PRESENTATION: We report a rare case of a misdiagnosis of primary mitral valvular tumor with severe regurgitation by preoperative echocardiography. During the surgery, the true lesion was found to be mitral valve leaflet prolapse due to degenerative mitral valve disease. CONCLUSION: For individual patient, the best clinical decision not only needs the extensive application of echocardiography, but also needs the combination of clinical symptoms and more auxiliary examination. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12872-023-03131-z.