Key result
Cardiac surgical intervention and histological examination were indispensable in two patients with lipomatous hypertrophy of the interatrial septum due to concurrent left atrial myxoma or SVC obstruction.
Case Report (n=2)
While LHIS is typically benign and managed conservatively, surgical intervention and histological confirmation may be necessary in cases with concomitant cardiac tumors or structural complications like SVC obstruction.
May prompt surgery in LHIS with concurrent tumors or obstruction; case reports leave open refined noninvasive criteria.
Lipomatous hypertrophy of the interatrial septum (LHIS) is an increasingly recognized heart condition characterized by fatty deposits in the interatrial septum with sparing of the fossa ovalis. Its distinctive characteristic features by imaging techniques, benign nature, and the fact that most patients remain asymptomatic, has limited the need for histological confirmation and operative intervention in most cases. In this report, we describe two cases of LHIS where cardiac surgical intervention was indispensable: in the first patient, due to the presence of an additional left atrial tumour found out as mixoma and in the second, to relief a superior vena cava obstruction together with bypass grafts for severe coronary artery disease. Histological samples of the interatrial septal lesion were obtained in both cases either because of uncertainty of the diagnosis (Case 1) or to confirm the diagnosis (Case 2).
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Calé et al. (2009) conducted a case report in Lipomatous hypertrophy of the interatrial septum (LHIS) (n=2). Cardiac surgical intervention and histological examination was evaluated. Cardiac surgical intervention and histological examination were indispensable in two patients with lipomatous hypertrophy of the interatrial septum due to concurrent left atrial myxoma or SVC obstruction.
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