USF-LVHN SELECT

Title

Reflectance confocal microscopic visualization of melanocytic bodies in the stratum corneum overlying acral lentiginous melanoma.

Publication/Presentation Date

3-1-2023

Abstract

BACKGROUND: We present a case of RCM evaluation of ALM surgical margins demonstrating intracorneal melanocytic bodies overlying subsequently confirmed melanoma in situ by histopathology.

CASE PRESENTATION: A 73-year-old male with a history of acral lentiginous melanoma (ALM) of the right great toe presented to our clinic for evaluation of positive surgical margins. The positive margin was localized for examination and subsequent biopsy with reflectance confocal microscopy (RCM) which allowed targeted re-resection of the area of concern. Three punch biopsies were obtained in the area of concern, which confirmed residual melanoma in situ. Immunostains confirmed the cellular remnants in the stratum corneum were melanocytic. To correlate the intra stratum corneum findings seen with confocal to the histopathology, a 3D rendering of a stack of images was used to demonstrate the location.

DISCUSSION: Typically, acral surfaces are challenging to examine with RCM due to the limited ability of light to penetrate thickened stratum corneum; however, we observed unique cellular features with confocal. Scattered hyper-reflective pleomorphic cells consistent with melanocytes were observed in the stratum corneum, although the visualized underlying epidermis appeared normal. Confocal microscopy may aid in diagnosis and management of ALM, especially in the context of positive surgical margins.

Volume

55

Issue

3

First Page

253

Last Page

256

ISSN

1096-9101

Disciplines

Medical Education | Medicine and Health Sciences

PubMedID

36883986

Department(s)

USF-LVHN SELECT Program, USF-LVHN SELECT Program Students

Document Type

Article

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