# New Tumor Cases Confirm Cancer Risks of AAV Gene Therapies

- Published: 2026-11-06 17:10 UTC
- Section: Life & Health › Medicine
- Tags: adeno-associated virus, AAV vector, gene therapy cancer risk, spinal muscular atrophy, viral delivery safety
- URL: https://realtech.media/news/rt-bca92e0c1ef40032fedcf4c4_new_tumor_cases/

**A series of clinical tumor cases confirmed that adeno-associated viruses used in gene therapy can trigger oncogenesis, shifting safety evaluations.**

![New Tumor Cases Confirm Cancer Risks of AAV Gene Therapies](https://sgzwpqqelzmajkcubgkl.supabase.co/storage/v1/object/public/rt-media/2026/11/7db1d9a377ccaa93.webp)
*ua.news*

A series of tumor cases reported this year provided convincing evidence that adeno-associated viruses (AAVs) used to deliver gene therapies can cause cancer in certain cases, according to ua.news citing STAT News [1]. For two decades, the potential of these small viral vectors to promote oncogenesis remained a subject of scientific debate and was regarded as largely theoretical [1]. To date, AAV-based vectors have been administered to thousands of patients worldwide [1].

The documented cases have concluded discussions regarding whether such insertional risks exist in human applications [1]. The confirmed oncogenic risk now forces clinicians, researchers, and patients' families to reassess the balance between potential adverse effects and the life-saving efficacy of genetic treatments [1].

According to University of Rochester neurologist Sam McKenzie, this development shifts the balance of considerations for certain patients with spinal muscular atrophy [1]. Furthermore, researchers anticipate that analyzing these clinical cases will help establish technical parameters to improve the design and safety profile of future viral delivery platforms [1].

## Sources

1. [ua.news](https://ua.news/en/dovkolo-svitu/novi-vipadki-pukhlin-pidtverdili-onkorizik-aav-terapii-stat-news)

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Source: RealTech, realtech.media — https://realtech.media/news/rt-bca92e0c1ef40032fedcf4c4_new_tumor_cases/