Secondary Orbital Conditions
Secondary orbital tumors are those that extend into the orbit from contiguous structures, including the globe, the eyelids, the lacrimal drainage system, the sinuses, or the brain.
Globe and Eyelid Origin
Tumors and inflammations from within the eye (especially from choroidal melanomas and retinoblastomas) or from the eyelid (eg, sebaceous gland carcinoma, squamous cell carcinoma, and basal cell carcinoma) can invade the orbit. Primary eyelid tumors are discussed in Chapter 10. Retinoblastoma, choroidal melanoma, and other ocular neoplasms are covered in BCSC Section 4, Ophthalmic Pathology and Intraocular Tumors, and Section 6, Pediatric Ophthalmology and Strabismus.
Excerpted from BCSC 2020-2021 series: Section 10 - Glaucoma. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.