Angioinvasive pulmonary mucormycosis presenting with massive haemoptysis secondary to pulmonary artery pseudoaneurysm

Pulmonary artery pseudoaneurysm (PAP) is a rare but potentially fatal entity caused by a variety of underlying conditions. They may be congenital in origin or occur due to infective complications or occasionally secondary to pulmonary arterial hypertension. Among infective processes, tuberculosis and bacterial infections are the most common causative agents. There are few isolated reports of angio-invasive mucormycosis causing PAP; many of them were detected postmortem. Diagnosis of specific aetiology is often overlooked due to lack of clinical suspicion, as a result of incomplete investigations or due to inappropriate imaging. This report presents a case of pulmonary mucormycosis complicated by PAP in a patient with clinically unsuspected, uncontrolled diabetes. We highlight how the combination of heightened clinical suspicion, appropriate imaging and timely intervention helped us to treat a potentially fatal complication in our patient.