Calling all CF experts (Steve Keiles, this means you): I have a prenatal couple in which the father is a carrier of the L1254X mutation, and the mother is a carrier of the M470V variant, and is 7T/9T. Father's polyT status not tested yet. From my reading, individuals with the M470V in cis with 5T can have CBAVD, chronic sinusitis, and CF-like lung disease. Worst case scenario if the fetus is L1254X/M470V, do I need to know if dad has 5T, would it in trans with the M470V cause a problem? Thanks! Robin ************************************ Robin M. Troxell, MS, CGC Genetic Counselor University of Missouri Department of Child Health Mercy St. John's Hospital (Springfield, MO) (p) 417-820-9839 (f) 417-820-3720 [log in to unmask] <mailto:[log in to unmask]> "This year, or this month, or, more likely, this very day, we have failed to practise ourselves the kind of behaviour we expect from other people." -- C.S. Lewis --