Cardiac paraganglioma: implications and impacts of a rare disease-a case report †.

Background: Tumour-producing catecholamines arise in the adrenal medulla (pheochromocytomas), as well as in extra-adrenal chromaffin cells (paragangliomas). The origin can be from any location; however, it is very rare in the heart. Case summary: A 43-year-old woman with a history of arterial hypertension presented with dyspnoea on moderate exertion, New York Class Association (NYHA) functional classes III and IV, and oedema in the lower extremities. Medical and laboratory evaluation revealed an NT-proBNP of 6046 pg/mL, a left ventricular ejection fraction (LVEF) of 15%, longitudinal strain of -7%, and a mass located on the inner surface of the left atrioventricular groove. Surgical intervention was performed, and the tumour was resected. Pathological report showed an extra-adrenal paraganglioma without neoplastic involvement in the margins of the vena cava. After surgery, the patient showed clinical improvement with NYHA functional class I, LVEF of 56%, and longitudinal strain of -20% on transthoracic echocardiography 4 months after treatment. Discussion: Paragangliomas are tumours that are rarely found in the heart, and their diagnosis is difficult. However, early detection and treatment can improve the quality of life of affected patients.