Abstract 13682: Not All Apical Left Ventricular Masses Are Thrombi: An Unusual Case of an Apical Left Ventricular Lipoma Presenting as Chest Pain and Palpitations

Abstract

Introduction: Cardiac lipomas are rare primary cardiac tumors. Depending on the location, they can present with vague symptoms such as chest pain, palpitations, dizziness, or arrhythmias. Case Presentation: A 58 y.o. female with a PMH of HLD and HTN presents for evaluation of chest pain and palpitations. An initial CvCTA was negative for significant CAD. A TTE showed a 1.6cm x 1.42 cm echolucent mobile mass attached to the lateral wall of the LV (Figure 1.A). Initially, there was a reasonable concern for an LV thrombus. However, it was unusual since the TTE revealed a normal EF and overall wall motion. Due to suspicions of a non-thrombus LV mass, a cardiac MRI was performed which showed a highly mobile mass attached to the mid anterior/anterolateral wall and a chordae within the LV cavity (Figure 1.B, Figure 1.C). The lesion was T2-hyperintense with loss of signal during fat suppression, highly suspicious for a lipoma. Given the mass mobility and strong patient preference, an elective robotic surgical resection was performed with a surgical biopsy confirming a lipoma (Figure 1.D). Discussion: Cardiac lipomas are often silent; however, symptoms can range from benign palpitations to life-threatening arrhythmias and outlet obstruction. TTE is typically the first-line imaging choice, followed by either cardiac CT or MRI imaging used for further diagnostic evaluation. Treatment options include conservative observation or prophylactic resection for asymptomatic patients, and therapeutic resection for symptomatic patients. Conclusion: Cardiac lipomas should be considered in the differential for any cardiac mass. TTE is the first-line imaging choice followed by a cardiac CT or MRI. Treatment remains a discussion between the patient and physician, varying from conservative management of symptoms to definitive treatment with surgical resection.