Rapidly Progressive Vision Loss in a Patient With Breast Cancer

A 67-year-old white female patient with metastatic breast cancer presented with 2 weeks of painless reduced vision in her right eye (OD), without headache, photophobia, diplopia, or eye pain, with placoid yellow choroidal lesions with ill-defined borders and subretinal fluid in each eye (OU). What is the diagnosis and what would you do next?
Source: JAMA - Journal of the American Medical Association - Category: General Medicine Source Type: research