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PSA immunoreactivity in a parotid oncocytoma: A diagnostic pitfall in discriminating primary parotid neoplasms from metastatic prostate cancer
Author(s) -
Holmes G. Frank,
Eisele David W.,
Rosenthal Dorothy,
Westra William H.
Publication year - 1998
Publication title -
diagnostic cytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.417
H-Index - 65
eISSN - 1097-0339
pISSN - 8755-1039
DOI - 10.1002/(sici)1097-0339(199809)19:3<221::aid-dc14>3.0.co;2-g
Subject(s) - medicine , pathology , immunoperoxidase , prostate cancer , prostate , oncocytoma , parotid gland , cancer , biopsy , immunohistochemistry , salivary gland , oncology , antibody , monoclonal antibody , immunology
Prostate‐specific antigen (PSA) is secreted by both normal and neoplastic acinar cells of the prostate gland, and the immunohistochemical detection of PSA is widely accepted as an excellent method for confirming the prostatic origin of metastatic tumor implants in men with prostate cancer. Less recognized is the observation that certain nonprostatic tissues and their neoplastic counterparts also secrete PSA. As one example, salivary gland ducts and certain salivary gland neoplasms have been reported to be immunoreactive for PSA. Potentially, this nonspecificity could be a diagnostic pitfall when using immunoperoxidase on fine‐needle aspiration (FNA) biopsy specimens to differentiate metastatic prostate cancer from primary salivary gland tumors. We report on a case where strong PSA immunoreactivity of a parotid oncocytoma led to its confusion with metastatic prostate cancer. Diagn. Cytopathol. 1998;19:221–225. © 1998 Wiley‐Liss, Inc.