PMID- 14501832 OWN - NLM STAT- MEDLINE DCOM- 20040601 LR - 20191108 IS - 1098-3600 (Print) IS - 1098-3600 (Linking) VI - 5 IP - 5 DP - 2003 Sep-Oct TI - Problems with ISCN FISH Nomenclature make it not practical for use in clinical test reports or cytogenetic databases [corrected]. PG - 370-7 AB - PURPOSE: To assess the extent and the sources of variation in ISCN nomenclature used by participants in CAP/ACMG surveys dealing with fluorescence in situ hybridization (FISH). METHODS: Over 1600 nomenclature strings from 15 challenges in seven surveys were evaluated for the contributions of diagnostic errors, syntax errors, methodological differences, and technical factors not foreseen by ISCN 1995. RESULTS: Although diagnostic errors were uncommon, syntax errors were numerous, approaching 50% of the responses for several challenges. Their frequency varied with the complexity of the nomenclature required to describe a test condition. Variation attributable to probe selection and band designation correlated with the number of probes available for addressing the diagnostic issue at hand. In the most dramatic example of this effect, a survey simulating diagnosis of trisomy 21 in uncultured amniocytes, there were 66 participants (of 99) who used the same general form for their nomenclature, but only 8 of the 66 had exactly the same nomenclature string. Participants used proprietary names, created their own nomenclature, or ignored the true complexity of probe systems when trying to describe conditions not foreseen by ISCN 1995. CONCLUSION: The use of current ISCN FISH nomenclature resulted in survey participants describing unique biological conditions in a multitude of different ways. In addition to making the nomenclature unsuitable for proficiency test purposes, this heterogeneity makes it impractical for clinical test reporting and for cytogenetic database management. Because methodological information contributes a large amount of variability, adds complexity, and increases opportunities for syntax errors, a system that excludes such information would be more effective. FAU - Mascarello, James T AU - Mascarello JT AD - Genzyme Genetics, Santa Fe, New Mexico 87505, USA. FAU - Cooley, Linda D AU - Cooley LD FAU - Davison, Keri AU - Davison K FAU - Dewald, Gordon W AU - Dewald GW FAU - Brothman, Arthur R AU - Brothman AR FAU - Herrman, Marille AU - Herrman M FAU - Park, Jonathan P AU - Park JP FAU - Persons, Diane L AU - Persons DL FAU - Rao, Kathleen W AU - Rao KW FAU - Schneider, Nancy R AU - Schneider NR FAU - Vance, Gail H AU - Vance GH CN - Cytogenetics Resource Committee, College of the American Pathologists CN - Cytogenetics Resource Committee, American College of Medical Genetics LA - eng PT - Journal Article PT - Review PL - United States TA - Genet Med JT - Genetics in medicine : official journal of the American College of Medical Genetics JID - 9815831 SB - IM EIN - Genet Med. 2003 Nov-Dec;5(6):478 CIN - Genet Med. 2003 Sep-Oct;5(5):345-6. PMID: 14501828 MH - Cytogenetic Analysis/*standards MH - Data Collection MH - *In Situ Hybridization, Fluorescence/standards MH - Laboratories/*standards MH - Quality Control MH - *Terminology as Topic RF - 5 EDAT- 2003/09/23 05:00 MHDA- 2004/06/02 05:00 CRDT- 2003/09/23 05:00 PHST- 2003/09/23 05:00 [pubmed] PHST- 2004/06/02 05:00 [medline] PHST- 2003/09/23 05:00 [entrez] AID - 10.1097/01.gim.0000086479.80559.ea [doi] PST - ppublish SO - Genet Med. 2003 Sep-Oct;5(5):370-7. doi: 10.1097/01.gim.0000086479.80559.ea.