Pseudoaneurysm Complicating Proximal Humeral Exostosis: A Case Report of a Missed Diagnosis on Computed Tomography Angiographic Examination

Abstract

Vascular complications of osteochondromas of the humerus are extremely rare. Only 9 cases with pseudoaneurysms of the brachial artery complicating osteochondromas of the humerus were reported in 7 English articles. The computed tomography (CT) angiographic examination of all of them were positive for the diagnosis of the pseudoaneurysm. Up to our knowledge, this is the first case report in which the CT angiography misdiagnosed such lesion. In this article, we described a case with a pseudoaneurysm complicating a proximal humeral exostosis in a 27-year-old male patient with a known history of hereditary multiple osteochondromas since childhood that was unanticipatedly misdiagnosed by the CT angiographic imaging modality. The participating authors tried to infer reasoned possibilities behind this unreported phenomenon before.

Keywords

• pseudoaneurysm
• osteochondroma
• exostosis
• humerus
• brachial artery
• ct angiography
• ultrasound