[Chromosomal abnormalities in carcinoma and hyperplasia of the prostate]

Epithelioid cells that had grown in short-term cultures derived from 10 cases of adenocarcinoma (PCa) and 10 cases of hyperplasia (BPH) of the prostate were karyotyped by the G-banding method for the pathogenesis of these disease. PCa specimens included 4 well, 2 moderately, and 4 poorly differentiated types, and were obtained by perineal needle biopsy from 4 patients in stage B and 6 patients in stage D2. Cells liberated from metastatic lymph node lesions of 2 patients with poorly differentiated PCa were also analyzed directly without cultivation in vitro. All BPH specimens were obtained by prostatectomy, and cells that had grown in epithelioid pattern in short-term cultures were analyzed. In PCa, hyperploidy was seen in all but 2 cases. Structure analysis disclosed abnormality of chromosome 16 in 4 PCa, deletion of Y in 3 PCa, abnormality of chromosomes 7, 14, 15, 18, and 19 in 2 PCa, and abnormality of chromosomes 3, 4, 17, and 21 in 1 PCa. Multiple markers were observed in 1 patient, and hyperploidy in another patient with metastatic lymph nodes. All but 2 cases of BPH were diploid. Normal male karyotypes were seen in 6 BPH. Trisomy of chromosomes 7 and 16 were observed in 2 BPH. Of 4 patients with stage B PCa, 3 who have been alive for 3 years to date had multiple abnormalities, whereas 1 patient who died 2 years after diagnosis had few abnormalities.(ABSTRACT TRUNCATED AT 250 WORDS)