An Unusual Site of Aneurysmal Bone Cyst in the Ethmoid Sinus- A Case Report

Abstract

Aneurysmal bone cyst is a rare non neoplastic tumour of bones. It is a cystic vascular lesion causing local destruction and invasion of adjacent structures with rapid invasion. Therefore, it requires early intervention. It typically involves long bones of limbs, ribs of thoracic cage, pelvic bones, and vertebrae in axial skeleton. Rarely it occurs in the head and neck region where mandible is found to be the most common site. It has been reported to arise from paranasal sinuses. However, ethmoid sinus is a very rare site. The rarity of aneurysmal bone cyst in such a location, involvement of adjacent structures, and recurrences makes it more interesting for radiologists. Here, the authors present an unusual site of aneurysmal bone cyst in a 22-year-old female involving the right ethmoid sinus with its typical Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) features.

Keywords

• benign
• bone tumour
• paranasal sinus
• rare site