Circulating Tumor DNA Assessment in Classic Hodgkin Lymphoma: Ready for Primetime?

Circulating tumor DNA (ctDNA) has emerged as a promising biomarker in classic Hodgkin lymphoma (cHL). Abundant ctDNA shedding from Hodgkin/Reed-Sternberg cells enables comprehensive molecular profiling directly from plasma. Recent studies have identified mutation- and copy-number-based molecular subtypes which now require harmonization across cohorts. Serial ctDNA monitoring at various landmarks, including end of treatment, allows sensitive detection of minimal residual disease and identifies patients at increased risk of relapse. Together, these data support ctDNA as a noninvasive tool that complements existing diagnostics and holds promise for more personalized, biology-guided treatment in cHL.