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Souchon, Rainer; Gertenbach, Ulrich; Dieckmann, Klaus-Peter; Hahn, Eugen; Ruwe, Markus; Stambolis, Christos; Loy, Volker; Classen, Johannes
Strahlentherapie und Onkologie 182, Številka: 5Journal Article
Current models of tumorigenesis postulate that testicular germ cell cancer uniformly develops through a preinvasive lesion termed testicular intraepithelial neoplasia (TIN). An open testicular biopsy is a simple and highly sensitive method to diagnose TIN, and this procedure constitutes the basis for curative treatment of TIN. Patients with testis cancer carry a significantly increased risk of developing contralateral testicular tumors. Therefore, a contralateral biopsy has been recommended in these patients. A negative biopsy was assumed to exclude the risk of a subsequent germ cell cancer in the testis due to the high sensitivity of the method. Reports on false-negative biopsies gave rise to the idea that TIN is not uniformly distributed throughout the testis. Consequently, double biopsies are thought to increase the diagnostic sensitivity. A 24-year-old patient with nonseminomatous testis cancer is reported. The patient had TIN-negative double biopsies in the contralateral testis. He received three cycles of standard PEB (cisplatin, etoposide, bleomycin) chemotherapy for visceral metastasis. 1 year after treatment the patient developed a nonseminomatous contralateral testis cancer which was treated by partial orchiectomy and subsequent local radiotherapy with 20 Gy. The case presented here highlights some clinically important aspects: a) even double biopsies of the testis may fail to detect TIN. b) Systemic cisplatin-based chemotherapy may fail to prevent contralateral testicular germ cell cancer. c) A metachronous contralateral testis cancer may-in contrast to common clinical perception-develop even soon after the diagnosis of the first testis tumor. Furthermore, the case could foster the hypothesis that testicular germ cell tumors may in some cases develop without a preceding stage of TIN.
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in: SICRIS
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