Dear Dr. Roach: I have a daughter (almost 31 years) who is concerned about Charcot-Marie-Tooth syndrome. Her maternal grandmother has been diagnosed with that condition. She is interested in seeking out a genetic test for the condition to learn if she is susceptible. She was referred to a commercial, direct-to-consumer laboratory for the test.
How likely is it that a lab test for this specific condition would be accurate? Should she be doing all of this through either a particular type of genetics counselor or her private physician (internist) rather than an independent effort? R.C.