Treatment of periocular basal cell carcinoma using an advanced stereotactic device.

Basal cell carcinoma (BCC) is the most common malignant periocular tumor. When periorbital invasion exists, orbital exenteration is necessary. A 73-year-old man with recurrent BCC of the inner canthus of the left eye with diffusion to the extrinsic muscles of the orbit and periorbital fat was treated with CyberKnife in stereotactic body radiation therapy (SBRT) modality. The treatment resulted in rapid tumor regression, with a complete remission after six months without toxicities. To the best of our knowledge, this is the first report in the English literature describing a locally advanced BCC treated with SBRT alone.