title: A new intracavitary lesion at echocardiography and MR: a case of mistaken identity.
abstract: Atrial myxomas often show contrast enhancement following administration of intravenous gadolinium, whereas thrombus appears as a hypointense structure, typically without any contrast enhancement. This case report presents a diagnostic challenge involving a recently developed left atrial mass in which echocardiography and cardiac MRI provided discordant results. While the morphological characteristics of the new left atrial lesion were suggestive of myxoma, the signal characteristics and behavior following intravenous gadolinium at MR, and, in particular, the rapid interval appearance of the lesion, prompted consideration for left atrial thrombus. Subsequent intra-operative and histopathologic evaluation proved the mass to be a left atrial myxoma.
authors.affiliation: Mayo Clinic, Phoenix, AZ, USA.
authors.forename: Anil
authors.initials: A
authors.lastname: Pandit
authors.forename: Prasad M
authors.initials: PM
authors.lastname: Panse
authors.forename: Aashrayata
authors.initials: A
authors.lastname: Aryal
authors.forename: James F
authors.initials: JF
authors.lastname: Gruden
authors.forename: Mike
authors.initials: M
authors.lastname: Gotway
mesh_terms: D003287:Contrast Media; D003937:Diagnosis, Differential; D017548:Echocardiography, Transesophageal; D006338:Heart Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009232:Myxoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D011237:Predictive Value of Tests; D013927:Thrombosis / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology
chemical_list: D003287:Contrast Media