What a test can show
Clinical RET sequencing with exact variant naming and confirmation; somatic RET fusions belong to a different oncology category.
Monogenic conditions
RETMultiple endocrine neoplasia type 2
Activating germline RET variants are linked to medullary thyroid cancer and MEN2; risk depends on the exact codon.
RELATIONSHIP VALIDITYHigh: established causality and genotype–phenotype relationship
ACTIONABILITYVery high for a confirmed pathogenic variant
SOURCE CHECKLinks and claim boundaries are editorially checked; external expert review is stated only with named disclosure
Practical meaning
The exact variant affects timing and scope of preventive and family care.
Where knowledge ends
A germline activating RET substitution and an acquired tumour RET fusion must not be conflated.
SOURCES AND VERSION
Verifiable, not ‘trust us’.
Updated: 14 August 2026. Any clinical interpretation requires the exact variant, testing method, family information and medical context.