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In vivo confocal microscopy for detection and grading of dysplastic nevi: A pilot study.
MedLine Citation:
PMID:  21742408     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Dysplastic nevi are thought to be precursors of melanoma during a stepwise process. However, this concept is still controversial and precise correlation between clinical and histopathologic features is lacking. In vivo confocal microscopy represents a noninvasive imaging technique producing horizontal sections at nearly histopathologic resolution. OBJECTIVE: We sought to determine whether specific histologic features in dysplastic nevi have reliable correlates on confocal microscopy and to develop an in vivo microscopic grading system. METHODS: Sixty melanocytic lesions with equivocal dermatoscopic aspects, corresponding to 19 nondysplastic nevi, 27 dysplastic nevi, and 14 melanomas, were analyzed by confocal microscopy and histopathology, using the Duke grading criteria. RESULTS: All architectural and cytologic features of the Duke grading score had significant reflectance confocal microscopy correlates. Confocally, dysplastic nevi were characterized by a ringed pattern, in association with a meshwork pattern in a large proportion of cases, along with atypical junctional cells in the center of the lesion, and irregular junctional nests with short interconnections. A simplified algorithm was developed to distinguish dysplastic nevi from melanoma and nondysplastic nevi. The contemporary presence of cytologic atypia and of atypical junctional nests (irregular, with short interconnections, and/or with nonhomogeneous cellularity) was suggestive of histologic dysplasia, whereas a widespread pagetoid infiltration, widespread cytologic atypia at the junction, and nonedged papillae suggested melanoma diagnosis. LIMITATIONS: A small number of cases were evaluated because of the necessity to analyze numerous histopathologic and confocal features. CONCLUSION: The possibility to detect dysplastic nevi in vivo may lead to an appropriate management decision.
Authors:
Giovanni Pellacani; Francesca Farnetani; Salvador Gonzalez; Caterina Longo; Anna Maria Cesinaro; Alice Casari; Francesca Beretti; Stefania Seidenari; Melissa Gill
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-7-8
Journal Detail:
Title:  Journal of the American Academy of Dermatology     Volume:  -     ISSN:  1097-6787     ISO Abbreviation:  -     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-7-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7907132     Medline TA:  J Am Acad Dermatol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 American Academy of Dermatology, Inc. Published by Mosby, Inc. All rights reserved.
Affiliation:
Department of Dermatology, University of Modena and Reggio Emilia, Modena, Italy; Dermatology Unit, First Medical Department, Arcispedale Santa Maria Nuova, Reggio Emilia, Italy.
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