Circulating tumor DNA (ctDNA) carries tumor-specific genetic and epigenetic variations. To identify extranodal natural killer/T cell lymphoma (ENKTL)-specific methylation markers and establish a diagnostic and prognosis prediction model for ENKTL, we describe the ENKTL-specific ctDNA methylation patterns by analyzing the methylation profiles of ENKTL plasma samples. We construct a diagnostic prediction model based on ctDNA methylation markers with both high specificity and sensitivity and close relevance to tumor staging and therapeutic response. Subsequently, we built a prognostic prediction model showing excellent performance, and its predictive accuracy is significantly better than the Ann Arbor staging and prognostic index of natural killer lymphoma (PINK) risk system. Notably, we further establish a PINK-C risk grading system to select individualized treatment for patients with different prognostic risks. In conclusion, these results suggest that ctDNA methylation markers are of great value in diagnosis, monitoring, and prognosis, which might have implications for clinical decision-making of patients with ENKTL.
ctDNA methylation shows great value in diagnosis, prognosis prediction of ENKTL
ctDNA methylation can be used as a biomarker to monitor disease progression
PINK-C risk assessment system could stratify patients for prognostic determinations
PINK-C risk assessment system might have implications for clinical decision-making
Tian et al. identify and validate a series of ctDNA methylation markers, which can assist in the accurate diagnosis, disease monitoring, and prognosis prediction of ENKTL and may provide therapeutic optimization for early-stage patients.