PMID- 24924836 OWN - NLM STAT- MEDLINE DCOM- 20150514 LR - 20211021 IS - 1525-1470 (Electronic) IS - 0736-8046 (Print) IS - 0736-8046 (Linking) VI - 31 IP - 5 DP - 2014 Sep-Oct TI - Fluorescence in situ hybridization analysis of atypical melanocytic proliferations and melanoma in young patients. PG - 561-9 LID - 10.1111/pde.12382 [doi] AB - Morphologic heterogeneity among melanocytic proliferations is a common challenge in the diagnosis of melanoma. In particular, atypical melanocytic lesions in children, adolescents, and young adults may be difficult to classify because of significant morphologic overlap with melanoma. Recently a four-probe fluorescence in situ hybridization (FISH) protocol to detect chromosomal abnormalities in chromosomes 6 and 11 has shown promise for improving the classification of melanocytic lesions. We sought to determine the correlation between FISH results, morphology, and clinical outcomes in a series of challenging melanocytic proliferations in young patients. We retrospectively performed the standard four-probe FISH analysis on 21 melanocytic neoplasms from 21 patients younger than 25 years of age (range 5-25 years, mean 14.6 years) from Stanford University Medical Center who were prospectively followed for a median of 51 months (range 1-136 months). The study cohort included patients with 5 confirmed melanomas, 2 melanocytic tumors of uncertain malignant potential (MelTUMPs), 10 morphologically challenging atypical Spitz tumors (ASTs), and 4 typical Spitz nevi. FISH detected chromosomal aberrations in all five melanomas and in one MelTUMP, in which the patient developed subsequent lymph node and distant metastasis. All 10 ASTs, 4 Spitz nevi, and 1 of 2 MelTUMPs were negative for significant gains or losses in chromosomes 6 and 11q. Our findings demonstrated a strong correlation between positive FISH results and the histomorphologic impression of melanoma. This finding was also true for the MelTUMP with poor clinical outcome. Therefore FISH may serve as a helpful adjunct in the classification of controversial melanocytic tumors in young patients. CI - (c) 2014 The Authors. Pediatric Dermatology published by Wiley Periodicals, Inc. FAU - DeMarchis, Emilia H AU - DeMarchis EH AD - School of Medicine, Stanford University, Stanford, California, USA. FAU - Swetter, Susan M AU - Swetter SM FAU - Jennings, Charay D AU - Jennings CD FAU - Kim, Jinah AU - Kim J LA - eng PT - Journal Article DEP - 20140613 PL - United States TA - Pediatr Dermatol JT - Pediatric dermatology JID - 8406799 SB - IM MH - Adolescent MH - Adult MH - Child MH - Child, Preschool MH - Female MH - Humans MH - *In Situ Hybridization, Fluorescence MH - Male MH - Melanoma/*diagnosis/*genetics MH - Nevus, Pigmented/*diagnosis/*genetics MH - Precancerous Conditions/*diagnosis/*genetics MH - Prospective Studies MH - Retrospective Studies MH - Skin Neoplasms/*diagnosis/*genetics PMC - PMC4282368 EDAT- 2014/06/14 06:00 MHDA- 2015/05/15 06:00 PMCR- 2015/01/02 CRDT- 2014/06/14 06:00 PHST- 2014/06/14 06:00 [entrez] PHST- 2014/06/14 06:00 [pubmed] PHST- 2015/05/15 06:00 [medline] PHST- 2015/01/02 00:00 [pmc-release] AID - 10.1111/pde.12382 [doi] PST - ppublish SO - Pediatr Dermatol. 2014 Sep-Oct;31(5):561-9. doi: 10.1111/pde.12382. Epub 2014 Jun 13.