Specimens from 75 cases of prostatic adenocarcinoma of different M.D. Anderson degrees of malignancy were stained immunohistochemically for neuron-specific enolase (NSE), prostatic specific antigen (PSA) and prostatic acid phosphatase (PAP). None of these tumors presented on hematoxylineosin sections any features suggesting neuroendocrine differentiation; nevertheless, 18.7% of the tumors were at least focally NSE positive. Because of the synchronous antigenic expression of the NSE-positive cells to PSA and PAP, the authors suggest that prostatic exocrine and neuroendocrine cells derive from a common precursor stem cell. The possibility of a more aggressive biological behavior of these tumors in comparison to the conventional carcinomas is discussed. The probable clinical necessity for a combined therapeutic approach is also investigated.

Keywords:
Prostatic adenocarcinoma, Neuron-specific enolase, Neuroendocrine differentiation, Immunohistochemistry
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© 1995 S. Karger AG, Basel
1995
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