2009 Southern Regional Meeting Abstracts

Case Report: A 62 year old man with history of metastatic prostate cancer presented with left eyelid swelling associated with proptosis. MRI face and orbit was done which showed band like curvilinear enhancing mass mainly occupying the lateral and superior portions in the left orbit (arrow-Panel A). He underwent orbitotomy with removal of the mass and immunohistochemical staining was positive (red-brown staining of the cytoplasm) for prostate specific acid phosphatase (arrows-Panel B). He was subsequently referred for local radiation therapy. On follow up after radiation therapy his proptosis had significantly improved.
The proportion of metastatic orbital cancer arising from prostatic carcinoma is only 4%. These patients most commonly present with decreased vision, periorbital pain and proptosis.
This case is presented to remind both radiologists and clinicians of the diagnosis of metastatic prostate carcinoma to the orbit and the usefulness of histochemical staining of biopsy material for prostate specific acid phosphatase.