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Combined surgery for lipomatous hypertrophy of the interatrial septum and pulmonary carcinoma.

L ipomatous hypertrophy of the interatrial septum (LHIS) is a rare benign tumor of the heart consisting of a nonencapsulated accumulation of mature fat, multivacuolated adipose cells, and enlarged cardiac myocytes.1-3 We report herein a case investigated for lung cancer in which LHIS was found incidentally. The cardiac tumor presented as a noncharacteristic form of LHIS with a pseudotumoral growth pattern. The cardiac and pulmonary tumors were removed through a right thoracotomy.