Cumulative survival in cases with dyskeratosis congenita, calculated using the method of Kaplan and Meier. (A) Cases reported in the literature through 2008, N = 552. (B) Cases enrolled in the NCI IBMFS DC cohort through 2007, N = 50. Data are the cumulative number of patients surviving, censored for age last known while alive. Insets show the survival curves for those with (solid red) and without (dashed blue) cancer.