Development of the international orbital Cavernous Hemangioma Exclusively Endonasal Resection (CHEER) staging system.

Background: Orbital cavernous hemangiomas (OCH) are the most common adult orbital tumor and represent an ideal index lesion for endonasal orbital tumor surgery. In order to standardize outcomes reporting, an anatomic-based staging system was developed.

Methods: An international, multidisciplinary panel of 23 experts in orbital tumor surgery was formed.