Largest-ever study of thyroid cancer genetics finds new mutations, suggests immunotherapy

University of Colorado Cancer Center researchers recently completed the largest-ever study of thyroid cancer genetics, mining the data of 583 patient samples of advanced differentiated thyroid cancer and 196 anaplastic thyroid cancers. In addition to identification of specific genes that may drive these cancers and thus provide attractive targets for treatment, the researchers found that in several samples of advanced differentiated and anaplastic thyroid cancer (the most aggressive and dangerous forms of the disease), mechanisms meant to repair faulty DNA had been broken. These broken repair mechanisms led to a subset of thyroid cancers accumulating a high number of genetic alterations – and this “high mutation burden” is a marker recognized by the FDA to recommend treatment with anti-cancer immunotherapies.

“Anaplastic thyroid cancer is a particularly terrible cancer – people wonder what makes it so bad, and advanced thyroid cancer causes significant morbidity. I’ve had a very productive relationship with Foundation Medicine, primarily to study rare salivary gland cancers and I’m pleased that we’ve been able to extend our collaboration to the study of thyroid cancers to hopefully answer some of these questions,” says Daniel Bowles, MD, clinical and translational investigator at CU Cancer Center and Head of Cancer


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