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Hi, it seems as if BMBs only look for specific chromosome problems (FISH). I think this is why a lot of people are told they have no cytogenetic abnormalities. I had blood karyotype done and with a very narrow range of testing (only tested for genes on parts of chromosome 1, 15 and X) and I have mutations or deletions on all the genes tested.
My BMB cytogenetics always came back negative.
I think with gene mapping more people will get a definite diagnosis and more specific treatment.
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