Metastatic breast carcinoma involving the optic disc.

Purpose: To report a rare case of unilateral optic nerve metastasis without choroidal involvement in a patient with known metastatic carcinoma of the breast.

Observations: A 65-year old female with a history of metastatic breast carcinoma presented to our clinic with a one-month history of blurred vision and floaters of the left eye. Fundoscopy of the left eye revealed a flesh colored nodule with white lobules demonstrating an endophytic growth pattern from the optic nerve.