Lymphoma of the orbit is a rare presentation of non-Hodgkin’s lymphoma (NHL), representing 8% of all extranodal NHL  and only 1% of all NHL. Localized orbital lymphomas are usually managed with radiotherapy alone with excellent local disease control. Because of the rarity of this disease and the effort to preserve the integrity of the orbit without compromising local control, radiation treatment is often technically challenging.

See the series from Bhatia, Fung, Pfeffer, Suh and Zhou

CT images: #1 , #2, #3, #4