RESUMO
A patient with known prostatic cancer presented with left supraorbital swelling with proptosis and restricted eye movements on left eye. Contrast enhanced computed tomography scan revealed dural and bone metastases with soft tissue component extending to the left orbit. Serum prostate specific antigen was markedly elevated at >100 ng/ml. Incision biopsy of the orbital tumor revealed only lymphocytic inflammatory cells within the fibrous stroma attributed mainly to the deeper location of the tumor or shallow locus of the biopsy. Incisional biopsy of the frontal bone revealed atypical looking cells in sheet cluster with nuclear enlargement, hyperchromatic in irregularity confirming the diagnosis of orbital metastasis of prostate carcinoma.Metastasis of prostate cancer to the orbit is rare. One should have a high index of suspicion of orbital metastasis when presented with an elderly patient with ocular symptoms and a history of prostate adenocarcinoma. A thorough clinical, radiological and histological evaluation is necessary to establish the diagnosis.