Abstract
Hodgkin's disease (HD) survivors face an increased risk of developing second cancers. We evaluated baseline cytogenetic biomarkers, sister chromatid exchange (SCE) and chromosome breaks [spontaneous (SCB) and bleomycin-induced (BIB)], as predictors of second cancer risk in a cohort of 105 adult HD patients. During follow-up, seven second cancers occurred. SCBs and BIBs showed no association with risk of second primaries. Multivariate Cox regression revealed that high levels of SCEs (relative risk (RR) = 11.3, p = 0.02) and age (RR = 1.08, p = 0.02) predicted second cancer risk. Histology, stage, and treatment were not associated with elevated risk. In conclusion, baseline SCE frequencies may be a useful biomarker for identifying HD patients at increased risk of developing second cancers. These results need to be verified in a larger cohort with a longer follow-up time.
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