title: A case of prostatic carcinoma metastatic to the orbit diagnosed by fine needle aspiration and immunoperoxidase staining for prostatic specific antigen.
abstract: A fine needle aspiration biopsy of the mass guided by computerized tomography was performed on a 65-year-old male with unilateral proptosis, inflammation, and diplopia in downgaze. Using an immunoperoxidase technique for prostatic specific antigen, the cytologic specimen stained positively. Subsequently, a needle biopsy of the prostate gland confirmed the presence of a moderately well-differentiated infiltrating carcinoma.
mesh_terms: D000368:Aged; D000951:Antigens, Neoplasm / Q000032:analysis*; D001707:Biopsy, Needle; D002277:Carcinoma / Q000000981:diagnostic imaging / Q000276:immunology / Q000473:pathology / Q000556:secondary*; D006801:Humans; D007124:Immunoenzyme Techniques; D008297:Male; D009918:Orbital Neoplasms / Q000000981:diagnostic imaging / Q000276:immunology / Q000473:pathology / Q000556:secondary*; D017430:Prostate-Specific Antigen; D011471:Prostatic Neoplasms; D013194:Staining and Labeling; D014057:Tomography, X-Ray Computed
chemical_list: D000951:Antigens, Neoplasm; D017430:Prostate-Specific Antigen