title: Mitral valve echocardiogram mimicking atrial tumor.
mesh_terms: D002648:Child; D003937:Diagnosis, Differential; D004452:Echocardiography; D006325:Heart Atria; D006338:Heart Neoplasms / Q000175:diagnosis; D006801:Humans; D008297:Male; D008945:Mitral Valve Prolapse / Q000175:diagnosis*