Orbital lesions diagnosis protocol

This retrospective study was reviewed and approved by the institutional review board. All the patients enrolled in this study were recruited from two independent institutions: the Second Affiliated Hospital of Zhejiang University, from February 2009 to June 2020, and Tianjin Medical University Eye Hospital, from December 2017 to May 2018. The inclusion criteria were as follows: (1) histopathological diagnosis of hemangioma or lymphoma based on the excised tissues from the orbital lesions and (2) patients with non–contrast-enhanced CT images before surgery. The exclusion criteria were: (1) patients with unclear histopathological results; (2) poor CT image quality or without CT images in axial view; and (3) history of eye or orbital surgery, trauma, radiation treatment, or other orbital therapy.