PMID- 31317337 OWN - NLM STAT- MEDLINE DCOM- 20200507 LR - 20200507 IS - 1179-2000 (Electronic) IS - 1177-1062 (Linking) VI - 23 IP - 5 DP - 2019 Oct TI - Issues with the Detection of Large Genomic Rearrangements in Molecular Diagnosis of 21-Hydroxylase Deficiency. PG - 563-567 LID - 10.1007/s40291-019-00415-z [doi] AB - More than 95% of congenital adrenal hyperplasia (CAH) cases are associated with mutations in the 21-hydroxylase gene (CYP21A2) in the human leukocyte antigen (HLA) class III area on the short arm of chromosome 6p21.3. In the diagnosis of 21-hydroxylase deficiency, CYP21A2 genotyping is a valuable complement to biochemical investigations. Genotyping can confirm the diagnosis (or carrier state) and, at the same time, provide accurate phenotype prediction in patients carrying severe mutations. In addition, the use of genetic testing is also helpful in prenatal diagnosis where the goal of prenatal treatment is preventing genital virilization of the female fetus. An in-depth knowledge of CYP21A2 genetics is essential to assure the correct interpretation of results obtained. To date, more than 200 small pathogenic variants of the CYP21A2 gene have been reported, showing good agreement between clinical phenotype and patient genotype. Recently, novel CYP21A2 deletions, involving one or more exons, have been reported in different populations. Since these rearrangements have never been described before in the genetic history of 21-hydroxylase deficiency, these new deletions have aroused particular interest. However, it is possible that these novel rearrangements are the result of incorrect interpretation of multiplex ligation-dependent probe amplification (MLPA). FAU - Concolino, Paola AU - Concolino P AUID- ORCID: 0000-0002-3472-8898 AD - Fondazione Policlinico Universitario A. Gemelli IRCCS, Largo A. Gemelli 8, 00168, Rome, Italy. paola.concolino@policlinicogemelli.it. LA - eng PT - Letter PT - Meta-Analysis PL - New Zealand TA - Mol Diagn Ther JT - Molecular diagnosis & therapy JID - 101264260 RN - Congenital adrenal hyperplasia due to 21 hydroxylase deficiency SB - IM MH - Adrenal Hyperplasia, Congenital/*diagnosis/*genetics MH - *Gene Rearrangement MH - *Genetic Association Studies/methods MH - *Genetic Predisposition to Disease MH - Genetic Testing MH - *Genetic Variation MH - *Genomics/methods MH - Humans MH - Molecular Diagnostic Techniques EDAT- 2019/07/19 06:00 MHDA- 2020/05/08 06:00 CRDT- 2019/07/19 06:00 PHST- 2019/07/19 06:00 [pubmed] PHST- 2020/05/08 06:00 [medline] PHST- 2019/07/19 06:00 [entrez] AID - 10.1007/s40291-019-00415-z [pii] AID - 10.1007/s40291-019-00415-z [doi] PST - ppublish SO - Mol Diagn Ther. 2019 Oct;23(5):563-567. doi: 10.1007/s40291-019-00415-z.