What a test can show
Comprehensive clinical CFTR testing; common-variant panels have ancestry limitations.
Monogenic conditions
CFTRCFTR-related disorders
Two disease-causing CFTR variants, usually on opposite gene copies (in trans), can cause cystic fibrosis; manifestations depend on the exact variants.
RELATIONSHIP VALIDITYHigh: established mechanism
ACTIONABILITYHigh in a clinical context
SOURCE CHECKLinks and claim boundaries are editorially checked; external expert review is stated only with named disclosure
Practical meaning
The exact genotype matters for diagnosis, family counselling and some targeted approaches.
Where knowledge ends
One variant often indicates carrier status, not disease; phenotype and variant phase matter.
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.