Scientists looked at nearly 2,000 adults with either non-medullary thyroid cancer or melanoma. They wanted to understand if two specific genetic changes ever happen at the same time. One change comes from inherited germline long-telomere syndrome variants. The other comes from acquired somatic TERT promoter variants. These changes affect how cells grow and divide.
The team found that these two genetic drivers are mutually exclusive. This means they do not appear together in the same tumor. In the group with thyroid cancer, only 13 out of 995 patients had the inherited genetic change. None of the 12 tumors tested had the acquired genetic change. The same pattern held true for melanoma patients.
High levels of telomerase activity were linked to the acquired genetic change but not the inherited one. Tumors with the acquired change also had larger sizes and more distant spread. The researchers note that the full picture of how these genes relate to disease is still being defined.
This finding helps doctors understand the biology of these cancers better. It suggests these two genetic paths lead to different biological impacts even though they both drive tumor growth. More research is needed to see how this knowledge changes patient care.