Squamous Cell Carcinoma of the Prostate: 2 Cases of a Rare Malignancy and Review of the Literature

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Abstract
Primary squamous cell carcinoma of the prostate is an extremely uncommon malignancy, accounting for less than 1% of all prostatic cancers. We report on 2 patients with primary squamous cell carcinoma of the prostate: 1 with organ-confined disease and 1 with metastatic disease. Both patients presented with urinary obstructive symptoms and carcinoma was not suspected on digital rectal examination. Serum acid phosphatase and prostate specific antigen levels were normal. From a review of the literature and our 2 cases it is apparent that squamous cell carcinoma of the prostate is biologically more aggressive than adenocarcinoma.