SESSION TITLE: Lung Cancer: Expect the Unexpected SESSION TYPE: Med Student/Res Case Report PRESENTED ON: 10/22/2019 3:45 PM - 4:45 PM INTRODUCTION: Case series suggest that two thirds of all cardiac metastases involve the pericardium, one third the epicardium or the myocardium and only 5% the endocardium. The pericardium tumors were mesothelioma and carcinoma of the lung, ovary, stomach and prostate. The epicardium involved most often by melanoma, lung squamous cell carcinoma and bronchoalveolar carcinoma. The myocardium most often involved by melanoma and lymphomyeloproliferative processes, whereas the endocardium was especially involved by melanoma, kidney carcinoma and liver carcinoma.[1] We are present this case to help recognize possible presenting symptoms of cardiac tumors including heart failure, arrhythmias, inflow/outflow tract obstruction, peripheral embolism, or symptoms of primary tumor. CASE PRESENTATION: A 54 year old female presented to emergency room with palpitations for two months with associated cough. Past medical history significant for active tobacco use, hypertension. She denied weight loss and other cardiopulmonary symptoms. CT chest obtained in the emergency room was notable for right lower lobe consolidation. Transthoracic echocardiogram to further investigate these palpitations showed a left atrial mass measuring 2.2x3.3 cm. She was treated with antibiotics for pneumonia and improved clinically. With the impression of left atrial myxoma, cardiac catheterization was performed that showed normal coronaries with preserved LV function. Cardiovascular surgeon proceeded with excision of left atrial mass. The tumor was found to be adherent to left atrial wall without involvement of pulmonary veins and was excised completely. His impression was that this mass was not a benign morphology of myxoma. Pathology reported squamous cell carcinoma of unknown origin. Given her risk factors for lung cancer, CT chest was repeated after completion of pneumonia treatment which showed evidence of right lower lobe lung mass. CT guided biopsy was performed which confirmed a poorly differentiated squamous cell carcinoma. PET scan showed evidence of liver, adrenal glands, and skeletal metastasis. Patient was diagnosed with stage IV poorly differentiated squamous cell carcinoma of the lung. DISCUSSION: Presentations vary from primary cardiac symptoms versus primary tumor symptoms. In our case, palpitations were our patient’s main complaint. 80% of cardiac tumors are benign with 50% of these benign tumors being myxomas. The incidence of myxomas in women is 2-4 times higher than in men CONCLUSIONS: Cardiac metastasis is very rare. Surgical excision of atrial metastasis can achieve long term survival in some cases, but overall the prognosis is poor, especially in patients like ours with non-small-cell lung cancer who already tend to have low survival rates. Our patient underwent surgical resection of left atrial mass and at least improved clinically from this standpoint. Reference #1: Bussani R, De-Giorgio F, Abbate A, Silvestri F. Cardiac metastases. J Clin Pathol. 2007;60(1):27-34.C DISCLOSURES: No relevant relationships by John Lung, source=Web Response No relevant relationships by Nooraldin Merza, source=Web Response No relevant relationships by Andrew Pham, source=Web Response No relevant relationships by AHMED QASIM, source=Web Response No relevant relationships by Kaylee Shepherd, source=Web Response
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