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. 2012 Aug;35(4):616-25.
doi: 10.1111/j.1365-2605.2011.01245.x. Epub 2012 Feb 9.

Gonadal and extragonadal germ cell tumours in the United States, 1973-2007

A Stang  1 , B Trabert, N Wentzensen, M B Cook, C Rusner, J W Oosterhuis, K A McGlynn
Affiliations

Gonadal and extragonadal germ cell tumours in the United States, 1973-2007

A Stang et al. Int J Androl. 2012 Aug.

Abstract

Germ cell tumours (GCTs) most often arise in the gonads, but some develop extragonadally. The aim of this study was to examine gender- and race-specific trends in incidence and survival of gonadal (GGCTs) and extragonadal GCTs (EGCTs) in the US from 1973 to 2007. We also examined the topographical distribution of EGCTs by race and gender. We estimated age-specific and age-standardized incidence rates and 5-year relative survival rates (RSR) of GCTs using the Surveillance, Epidemiology and End Results (SEER) Program (SEER nine registries). GCTs and their topographical sites were identified using ICD-O morphology and topography codes. Of 21,170 GCTs among males, 5.7% were extragonadal (Whites 5.5%; Blacks 16.3%). Of 2093 GCTs among females, 39.3% were extragonadal (Whites, 36.9%; Blacks 51.0%). The incidence of GGCT was much higher among White (56.3/1,000,000) than Black males (10.0/1,000,000), while there was no difference in incidence between White and Black females (3.2/1,000,000). The rates of EGCT among men and women of both races were similar (range:1.9-3.4/1,000,000). The most frequent extragonadal sites were mediastinum among males and placenta among females. The 5-year RSR of testicular GCT was higher among Whites (97%) than Blacks (90%), as was the 5-year RSR of ovarian GCT (Whites, 92%; Blacks 85%). In general, the 5-year RSRs of EGCTs were lower than the 5-year RSRs of GGCTs. The different incidence trends of GGCTs and EGCTs and distinct age-specific incidence patterns by anatomical site of EGCTs suggest that GGCTs and EGCTs may have different aetiologies.

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Figures

Figure 1
Figure 1
Gonadal and extragonadal germ cell tumors among whites and blacks, SEER-9, 1973–2007
Figure 2
Figure 2
Incidence time trends of gonadal and extragonadal germ cell tumors among males and females, US SEER-9, 1973–2007 (Cases per 100,000)
Figure 3
Figure 3
Age-specific incidence rates of gonadal germ cell tumors among by race, US SEER-9, 1973–2007(Cases per 1 million)
Figure 4
Figure 4
Sex- and age-specific incidence rates of extragonadal germ cell tumors among whites, US SEER-9, 1973–2007 (Cases per 1 million)
Figure 4
Figure 4
Sex- and age-specific incidence rates of extragonadal germ cell tumors among whites, US SEER-9, 1973–2007 (Cases per 1 million)
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