TCF4 and DM1 clinical testing

3X Genetics is a CLIA-registered laboratory (CLIA ID 22D2345868) in Leominster, Massachusetts, operating to CLIA requirements. Our Massachusetts state licensure survey is scheduled for late 2026; clinical reporting opens after it.

Two laboratory-developed tests are in analytical validation: TCF4 CTG repeat expansion testing for Fuchs endothelial corneal dystrophy (FECD), and DMPK CTG repeat expansion testing for myotonic dystrophy type 1 (DM1). Each will report both allele sizes and the classification bands, with the single-molecule profile of expanded alleles available as an extended report.

To be notified when ordering opens, email us using the button below. Physicians and genetic counselors who want to discuss the assays before launch can write to [email protected].