Orbital metastases as the first manifestation of lung adenocarcinoma.

Reduction in visual acuity due to orbital metastasis is rarely the first sign of lung cancer and very few cases have been published in the literature. Here we report a rare case of lung adenocarcinoma with orbital metastasis as the first presenting sign. The incidence of primary tumors that metastasize to the orbit is approximately 7%. In 19% of the cases, there is no history of cancer when the patient presents with ophthalmic symptoms, and in 10%, the primary site remains obscure despite intensive systemic evaluation. Our patient showed a partial improvement in vision after successful combination of chemotherapy and radiotherapy. Blurred vision due to orbital metastasis as the primary symptom of lung cancer is very uncommon. A great index of suspicion is essential when an orbital lesion appears.