Large main pulmonary artery aneurysm: Case report and brief review of the literature

Pulmonary artery aneurysms are a rare but often fatal clinical entity with an estimated incidence of 1 in 14,000 individuals in postmortem studies. They can be congenital or acquired. No specific guidelines regarding their optimal management, medical or surgical, currently exist and treatment is planned on a case-by-case basis since data regarding their clinical course and prognosis are limited. We present the case of a 77-year-old male patient who presented at the Emergency Department of our hospital with a complaint of exertional dyspnea and dull substernal pain over 1 week. Upon investigation, a main pulmonary artery true aneurysm measuring 61 mm on Computed Tomography was detected. The patient's history was remarkable for heavy smoking, arterial hypertension, dyslipidemia, known ascending aortic aneurysm, moderate COPD, and past tuberculosis. He was admitted to the Cardiology unit and treated as a case of decompensated heart failure with preserved ejection fraction. His symptoms improved with intravenous diuretics. A past chest MRI report, 7 years before his current event, described the main PA aneurysm measuring 51-52 mm. Regarding the main PA aneurysm, the heart team decided to follow a conservative approach with regular follow-up visits based on the patient's comorbidities, functional status, and slow growth rate of the PA aneurysm. Management of pulmonary artery aneurysms requires a heart-team approach in the context of the patient's underlying conditions and symptoms. More data are required in order to guide a treatment plan with an acceptable risk – benefit profile for each patient.