Granulicatella adiacens Endocarditis Complicated by Mycotic Pulmonary Artery Aneurysm in Adult Patients:...

Granulicatella adiacens is an uncommon cause of infective endocarditis (IE) and has rarely been associated with mycotic pulmonary artery aneurysm (MPAA).

An 18-year-old woman with patent ductus arteriosus and poor dental hygiene presented with massive hemoptysis. Multimodal imaging identified G. adiacens IE complicated by a saccular MPAA and severe valvular involvement. Management included targeted antibiotics, endovascular embolization, and combined mitral-aortic valve surgery with patent ductus arteriosus closure, resulting in full clinical recovery.

A fastidious microbiological behavior can delay diagnosis, making multimodal imaging essential for detecting complications such as MPAA. Coordinated medical-surgical therapy is critical in complex IE presentations.

G. adiacens can cause aggressive IE with rare vascular complications. Multimodal imaging is indispensable for timely detection of MPAA in IE, enabling staged interventions that optimize outcomes.