TABLE I.

Primary Central Nervous System Lymphoma (PCNSL) Surveillance, Epidemiology, and End Results (SEER) Program Incidence^a

	Incidence rates (per 100,000)b
Populations	1973–1984	1985–1997	1998–2008
All SEER registries	0.2	0.9	0.7
Male	0.2	1.5	0.8
Female	0.2	0.5	0.5
All SEER registries
20–39 years	0	0.7	0.2
Male	0.1	1.4	0.3
Female	0	0.1	0.1
40–64 years	0.2	0.9	0.6
Male	0.2	1.5	0.8
Female	0.2	0.4	0.4
65 years or older	0.5	1.4	1.8
Male	0.5	1.7	2.0
Female	0.5	1.3	1.7
Non-San Francisco registries  with marital exclusions	0.2	0.8	0.6
Male
Female	0.2	1.1	0.7
Non-San Francisco registries  with marital exclusions
20–39 years	0	0.5	0.2
Male	0.1	0.9	0.3
Female	0	0.1	0.1
40–64 years	0.2	0.7	0.5
Male	0.2	1.0	0.7
Female	0.2	0.4	0.4
65 years or older	0.4	1.5	1.8
Male	0.5	1.7	2.0
Female	0	1.3	2.0

^aData excluded never-married cases and those cases in which the marital status was unknown. Calculated from SEER.

^bSTAT 3.0.14.