Y chromosome loss may signal early cancer risk in men

A new study led by Dr. Dan Theodorescu, a physician‑scientist at the University of Arizona Cancer Center, has found that the loss of the Y chromosome in male body tissues can create a pre‑neoplastic field that may facilitate cancer development. Published in *JCI Insights*, the research shows that this chromosomal loss, which becomes more common as men age, generates a hidden zone of genetic vulnerability in otherwise normal tissue.

The investigators explain that the loss of the Y chromosome does not directly cause cancer but establishes a “preneoplastic field effect,” a microenvironment where cells are primed for malignant transformation. By altering the genomic landscape, the Y‑chromosome‑deficient cells become more susceptible to additional oncogenic hits, providing a fertile ground for tumor initiation.

These findings highlight the importance of monitoring Y‑chromosome status as a potential biomarker for cancer risk in aging men and suggest that interventions aimed at preserving Y‑chromosome integrity could play a role in future cancer prevention strategies.