Diagnosis of infective endocarditis is challenging as the clinical diversity of the disease sometimes misleads clinicians in the recognition, correct diagnosis and rapid treatment, which are important to reduce the morbidity and mortality associated with this disease.
We report the case of a 14-year-old girl who presented with left axillary pain and fever. She was eventually diagnosed with infective endocarditis caused by Abiotropia defectiva, complicated by a large saccular aneurysm of the left axillary artery.