Variable Genomic Landscapes of Advanced Melanomas with Heavy Pigmentation.

ABSTRACT:

Background

In the current study, we examined the real-world prevalence of highly pigmented advanced melanomas (HPMel) and the clinicopathologic, genomic, and ICPI biomarker signatures of this class of tumors.

Materials and methods

Our case archive of clinical melanoma samples for which the ordering physician requested testing for both PD-L1 immunohistochemistry (IHC) and comprehensive genomic profiling (CGP) was screened for HPMel cases, as well as for non-pigmented or lightly pigmented advanced melanoma cases (LPMel).

Results

Of the 1268 consecutive melanoma biopsies in our archive that had been submitted for PD-L1 IHC, 13.0% (165/1268) were HPMel and 87.0% (1103/1268) were LPMel. In the HPMel cohort, we saw a significantly lower tumor mutational burden (TMB, median

SUBMITTER: Huang RSP 

PROVIDER: S-EPMC9355815 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature