SUPPLEMENTARY MATERIAL ONLINE Supplementary materials and methods Supplementary figure legends Figure S1. Measurement of telomere length by ImageJ and identification of cell types in TMA by H&E Figure S2. Representative FISH images of telomere length variation in HCC cells and non‐tumor cells Figure S3. Relative telomere length detected by qPCR Figure S4. Kaplan–Meier curves of OS and TTR according to the median telomere length Table S1. Patient characteristics Table S2. Descriptive statistics of telomere‐specific FISH (n = 257) Table S3. Univariate and multivariate analysis of factors associated with OS (n = 257) Table S4. Univariate and multivariate analysis of factors associated with TTR (n = 257)