Evidence behind the use of molecular tests in melanocytic lesions and practice patterns of these tests by dermatopathologists.

Emanuel PO1, Andea AA2, Vidal CI3, Missall TA3, Novoa RA4, Bohlke AK5, Hughes SR6, Yadira Hurley M3, Kim J4.

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Abstract

BACKGROUND:

The gold standard for the diagnosis of melanocytic lesions is histologic examination. However, as histologic examination can have its limitations, there are many clinical scenarios in which additional testing may be appropriate in an attempt to render a definitive diagnosis.

METHODS:

A literature review for three ancillary tests - comparative genomic hybridization (CGH)/ single nucleotide polymorphism (SNP) array, fluorescence in situ hybridization (FISH), and gene expression profiling by quantitative reverse transcription polymerase chain reaction (qRT-PCR) - was compiled and current use patterns were tabulated. Survey of the practice patterns of these tests by dermatopathologists was also accessed in the attendees of the American Society of Dermatopathology Annual Meeting (Chicago, 2016).

RESULTS:

Here we summarize the use of these molecular tests in melanocytic lesions. We found that 54.4% of the respondents surveyed utilize (or expect consultants to utilize) molecular testing of melanocytic lesions in their practice when appropriate.

CONCLUSIONS:

CGH/ SNP arrays, FISH testing and qRT-PCR applied to melanocytic lesions has allowed for more accurate classification. Just over half of those surveyed use molecular testing for melanocytic lesion with the majority sending their cases out for completion of the molecular test. This article is protected by copyright. All rights reserved.