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  • Title: Testicular germ cell tumours in Iceland: a nationwide clinicopathological study.
    Author: Agnarsson BA, Gudbjartsson T, Einarsson GV, Magnusson K, Thoroddsen A, Bergthorsson JT, Amundadottir L, Barkardottir RB, Björnsson J.
    Journal: APMIS; 2006 Nov; 114(11):779-83. PubMed ID: 17078858.
    Abstract:
    The purpose of this study was to examine the pathology of all germ cell tumours of the testis diagnosed in Iceland 1955-2002. A total of 214 patients were included in the study. The current age-standardized incidence was found to be 6.1 per 100,000 and had increased almost fourfold during the study period. Seminoma was diagnosed in 55% of cases. Non-seminomas were diagnosed in 45%, and these were further classified as mixed germ cell tumours (33%), embryonal carcinoma (8%), teratoma (3%), and yolk sac tumour (n=1). The mean age at diagnosis was significantly higher for the seminomas than the non-seminomas (38 years versus 29 years) (p<0.001) and the non-seminomas were diagnosed at a significantly higher stage than the seminomas (p<0.001). Thus, in seminoma patients the tumour was localized to the testis (stage I) in 81% of cases, in 17% of patients the tumour had spread to the lymph nodes (stage II or III), and only 2% had extranodal metastasis at diagnosis (stage IV). In contrast, in the non-seminoma patients, the tumours were found to be stage I in 56%, stage II or III in 24%, and stage IV in 20% of cases. No significant difference in staging was found between non-seminoma subtypes. Identification of necrosis or vascular invasion was significantly associated with metastatic disease at diagnosis (p=0.002). During the study period a significant increase in stage I tumours was found as well as a decrease in the size of the tumours.
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