Figure 2 Pre- and post-treatment orbital imaging demonstrating regression of the right superonasal orbital mass. (A–C) Pre-treatment imaging. (A) CT scan shows an enhancing soft-tissue lesion in the right superonasal orbit infiltrating the superior rectus muscle. (B) Axial contrast-enhanced CT further delineates the extraconal soft-tissue mass. (C) Axial PET/CT shows mildly fluorodeoxyglucose-avid soft-tissue thickening in the superior nasal orbit (SUVmax=6.2), indicative of lymphoma. (D–F) Post-treatment imaging obtained after surgical excision and adjuvant radiotherapy. (D) Coronal CT scan shows marked reduction of the previously noted orbital mass with minimal residual thickening. (E) Axial CT scan confirms near-complete morphologic resolution. (F) Axial PET/CT image reveals complete metabolic resolution of the lesion. CT – computed tomography; PET – positron emission tomography; SUVmax – maximum standardized uptake value.