RESUMO
To obtain more information on chromosomal changes in the up-to-now poorly studied tumor class of penile squamous cell carcinoma (SCC), we performed a comparative genomic hybridization study of 26 cases of this rare tumor. DNA sequence copy number alterations (CNAs) very similar to those detected in other SCC types, such as oral and esophageal SCC, were noted. The most common copy number gains were found in 8q24, 16p11-12, 20q11-13, 22q, 19q13, and 5p15, and the most common deletions were detected in 13q21-22, 4q21-32, and along the X chromosome. Classifying the patients according to the number of CNAs showed a possible correlation with clinical outcome.
Assuntos
Carcinoma de Células Escamosas/genética , Deleção Cromossômica , Amplificação de Genes/genética , Neoplasias Penianas/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Dosagem de Genes , Humanos , Masculino , Pessoa de Meia-Idade , Hibridização de Ácido NucleicoRESUMO
Telomerase activity was studied in 51 penile carcinomas, and detected in all samples from 3 patients with verrucous carcinoma, in 85.4% (41/48) of invasive carcinomas, in 81.8% (9/11) of adjacent non-cancerous skin and in 80% (8/10) of adjacent non-cancerous corpus cavernosum. All skin and corpus cavernosum samples from patients with prostatic carcinoma were found to be telomerase negative. Our results indicate a correlation between frequency of telomerase activity and grade of penile carcinoma. The finding of telomerase activity in skin and corpus cavernosum samples adjacent to tumor suggests that unidentified local factors may modulate telomerase activity in normal tissues.