Table 2.

Non-malignant vestibular schwannoma incidence in SEER18, 2004–2017, ages 20+ years.

			Method of diagnosis
	TOTAL		Microscopic		Radiographic
Characteristic	Cases	Rate	Cases	Rate	Cases	Rate	% RGCa
TOTAL	17,475	1.92	8,033	0.89	9,044	0.99	52
Sex
Male	8,343	1.92	3,764	0.86	4,405	1.03	54
Female	9,132	1.93	4,269	0.92	4,639	0.96	50
Race/Ethnicity
NH White	13,016	2.28	5,947	1.09	6,783	1.13	50
NH Black	737	0.78	294	0.30	424	0.47	60
NH AI/AN	110	1.64	44	0.62	65	1.00	61
NH API	1,630	1.84	770	0.85	831	0.96	52
Hispanic	1,663	1.18	878	0.56	745	0.59	50
Age
20–39	2,261	0.71	1,590	0.49	643	0.20	28
40–64	10,186	2.48	5,267	1.31	4,708	1.12	45
65–79	4,226	3.77	1,097	0.95	3,015	2.72	72
80+	802	2.00	79	0.20	678	1.69	85
Size
<2cm	9,236	1.01	2,580	0.31	6,206	0.68	67
≥ 2cm	4,973	0.56	3,441	0.39	1,484	0.17	30
Unknown size	3,266	0.36	1,742	0.19	1,354	0.15	42
Age<65 by size
<2cm	6,249	0.80	2,459	0.32	3,680	0.46	58
≥ 2cm	3,801	0.51	2,929	0.40	843	0.11	22
Unknown size	2,397	0.31	1,469	0.20	828	0.11	35
Age 65+ by size
<2cm	2,987	1.96	391	0.24	2,526	1.67	85
≥ 2cm	1,172	0.77	512	0.33	641	0.43	56
Unknown size	869	0.57	273	0.18	526	0.35	61
Laterality
Right	8,534	0.94	3,902	0.43	4,467	0.49	52
Left	8,599	0.95	3,993	0.44	4,429	0.49	52
Other/Unknown	342	0.04	138	0.02	148	0.02	50
Year of diagnosis
2004–2008	5,635	1.87	2,959	0.97	2,566	0.86	46
2009–2013	6,382	1.94	2,843	0.87	3,381	1.03	53
2014–2017	5,458	1.94	2,231	0.82	3,097	1.08	56

^a% RGC: Percent radiographically confirmed based on rates. Incidence rates are age-adjusted to the 2000 US population standard and displayed per 100,000 person-years. NH: non-Hispanic; AI/AN: American Indian/Alaska Native; API: Asian/Pacific Islander