Abstract
A prospective study was done to evaluate 47 patients with early stage prostatic cancer. Pelvic lymphadenectomy was combined with bone marrow acid phosphatase determinations to evaluate early metastatic disease. Thirteen patients (28 per cent) had tumor in the pelvic lymph nodes. In no instance was the bone marrow acid phosphatase elevated to more than the normal value for serum by the substrate used. Combined high grade and stage tumors seemed to have an increased incidence of metastases to pelvic lymph nodes. A surprisingly high incidence of B1 lesions (5 of 21 patients or 24 per cent) had positive lymph nodes. Generally, the nodes were moderately well or well differentiated lesions. The metastases were unilateral, frequently microscopic only and involved 1 or only a few nodes. Pelvic lymphadenectomy seems to have a well defined role in the diagnostic study of early stage prostatic cancer, while bone marrow acid phosphatase determinations were of no value.
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