Effect of treatment of rectal cancer metastasis with intravitreal bevacizumab (Avastin) in patient with subretinal fluid and macular oedema: short-term follow-up

We describe the management of subretinal fluid and macular oedema due to colorectal cancer metastasis to the choroid using intravitreal bevacizumab. A patient with grade VI KRAS mutation rectal cancer with metastasis to the lung and cerebellum presented with left eye choroidal metastasis 1 week after being started on the experimental medication KTN3379. After intravitreal bevacizumab administration, the patient had improvement in macular subretinal fluid, but eventually progressed to severe cystoid macular oedema despite monthly intravitreal bevacizumab treatment.

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