Figure 2. Incidence of Larynx Cancer by Stage From 1986 to 2018.

Data are from the Surveillance, Epidemiology, and End Results (SEER) Program SEER*Stat database, released April 2021, based on the November 2020 submission from SEER 9 research data.⁵ Data from 2003 and 2004 were omitted because of instability of estimates during the transition from the old to new staging system. The vertical dashed line demarcates the omitted data during the transition from one staging system to the next. The period to the left of the line is staging system Historic Stage A, and the period to the right of the line is Combined Summary Stage.