Key result
Lipomatous hypertrophy of the interatrial septum (LASH) is a dumbbell-shaped mass diagnosed by echocardiography, CT, or CMR that is managed conservatively with reassurance and follow-up.
LASH should be considered in the differential diagnosis of atrial tumors, identifiable by its 'dumbbell' shape on multimodality imaging and managed conservatively.
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May aid atrial mass differentials; leaves open validation of conservative management in larger series.
Xanthopoulos et al. (2017) studied this question. Lipomatous hypertrophy of the interatrial septum (LASH) is a dumbbell-shaped mass diagnosed by echocardiography, CT, or CMR that is managed conservatively with reassurance and follow-up.
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