Table 2.

Age-standardized incidence rates (cases per 1 million) of extragonadal germ cell tumors by primary site, sex and histologic group (whites only); SEER-9, 1973–2007

Topography (ICD-O)	White Males						White Females
	Seminoma			Nonseminoma			Dysgerminoma			Non-Dysgerminoma
	N	ASR	SE	N	ASR	SE	N	ASR	SE	N	ASR	SE
Gonadal germ cell tumors
Testis (C62.0–C62.9)	10,994	32.7	0.33	8,398	23.1	0.25
Ovary (C56)							393	1.1	0.06	701	2.0	0.08
Primary sites of extragonadal germ cell tumors
Thymus (C37.9)	9			9			1			1
Mediastinum (C38.1–C38.3)	194	0.6	0.04	212	0.6	0.04	12			26	0.1	0.02
Retroperitoneum (C48.0)	73	0.2	0.03	81	0.2	0.03	1			12
Pelvis (C49.5, C76.3)	4			35	0.1	0.02	0			60	0.2	0.02
Uterus (C54–C55)							1			45	0.1	0.02
Female genital tract (C57)							3			20	0.1	0.01
Placenta (C58)							0			312	0.9	0.05
Brain, NOS (C71.0–C71.9)	59	0.2	0.02	24	0.1	0.01	26	0.1	0.02	15
Pineal gland (C75.3)	127	0.4	0.03	48	0.1	0.02	7			3
Pituitary gland (C75.1)	17	0.0	0.01	3			11			5
Malignant neoplasm of other and ill-defined sites (C76excl. C76.3)	2			6			0			2
Other sites*	16	0.0	0.01	44	0.1	0.02	6			46	0.1	0.02
Unknown primary site (C80.9)	57	0.2	0.02	105	0.3	0.03	6			21	0.1	0.01
All extragonadal germ cell tumors	558	1.6	0.07	567	1.6	0.07	74	0.2	0.03	567	1.6	0.07

^*all other sites had less than 16 registered cases in each sex-race stratum of the registration period 1973–2007