BACKGROUND: We herein report a case of huge pulmonary artery aneurysm in a 55-year-old male farmer from the Nile delta (Lower-Egypt), mostly due to infestation with Schistosoma mansoni, which is the parasite causing hepatosplenic schistosomiasis.

CASE REPORT: This male patient was admitted with a month-long history of progressive shortness of breath, 2-month history of fever, and a cough with mucoid sputum for 10 days. On examination, he had normal temperature and blood pressure, but he had tachypnea, tachycardia, and congested neck veins. Electrocardiography showed multifocal atrial tachycardia and right bundle branch block.

CONCLUSIONS: The present case is unique in that it shows the presence of a huge pulmonary artery aneurysm despite the absence of pulmonary hypertension.

Keywords: Fatal Outcome, Aneurysm - etiology, Hypertension, Pulmonary, Liver Diseases, Parasitic - diagnosis, Pulmonary Artery, Pulmonary Embolism - etiology, Schistosomiasis mansoni - diagnosis, Splenic Diseases - parasitology