Association of TERT variants with telomere length and age at MDS diagnosis. (A) Pretransplant whole blood relative telomere length by TERT variant status. (B) Age at MDS diagnosis by TERT variant status. TERT variant groups are labeled: no TERT variant (black), TERT common variant (gray), and TERT rare variant (red). (C) Variant allele fraction distribution of TERT variants, germline SNPs (black), and myeloid mutations (blue). (D) Variant allele fraction distribution of TERT rare variants as a function of the proportion of blood lymphocytes. Linear regression slope with P value is shown.