Genetic Testing for Pachygyria - Lissencephaly
What is Genetic Testing?
A genetic test is the analysis of human DNA, RNA, chromosomes, proteins, or certain metabolites in order to detect alterations related to a heritable disorder. This can be accomplished by directly examining the DNA or RNA that makes up a gene (direct testing), looking at markers co-inherited with a disease-causing gene (linkage testing), assaying certain metabolites (biochemical testing), or examining the chromosomes (cytogenetic testing). Selected methodology terms are used in the GeneTests Laboratory Directory.
Genetic Tests for PACHYGYIA or Lissencephaly 1 (LIS1)
These tests were completed on Corey through Emory and Univ. of Chicago.
TEST 1: Lissencephaly Type 1: Miller-Dieker is the first Chromosome 17 testing done on Corey at Emory University. This test came back normal for Corey. 2006 (If normal do test 2)
TEST 2: Sequencing of the LIS1 gene can only be done at the University of Chicago or at two labs in Germany. This test came back normal for Corey. 2007 (If normal do test 3)
TEST 3: MLPA-based dup/del test - The yield is high, at least 1/3 chance of finding an abnormality. This test came back normal for Corey. 2007 (He is now a candidate for the research program with Dr. Dobyns.)
All the testing required just one blood draw at Emory in Atlanta. It was about 4-5 vials of blood but went quickly. Emory was very helpful working with Univ. of Chicago and the billing. The in state work on test 1 was covered by insurance and medicaid. The other 2 tests out of state are billed to my insurance and the remainder paid by us.
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Chromosome 17 has the "address" to LIS 1. To learn more about chromosomes and genetic testing visit http://www.ornl.gov/sci/techresources/Human_Genome/posters/chromosome/diseaseindex.shtml#tests.
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Syndromes with lissencephaly. I:
Miller-Dieker and Norman-Roberts syndromes and isolated lissencephaly.
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Although genetic testing shares some features in common with other kinds of laboratory testing, in many ways it is unique and requires special considerations.
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