In addition, the presence of a TERT mutation may be used to distinguish between fibroepithelial lesions (including both FA and PTs) with high specificity using the TERT promoter mutations alone, or in combination with TERT copy number variations.21,23,25,45 Nasir et al reported a sensitivity and specificity of 41% and 94% for TERT promoter mutations to distinguish FA from PT.21 In another similar study, TERT− 124 C > T promoter mutation and/or amplification status distinguished FA from PT with a sensitivity of 39.5% (95% CI 28.7-51.4) and a specificity of 100.0% (95% CI 95.4-100.0).25 Here, TERT is linked to Friedreich ataxia.