Dermatofibroma with Hypopigmented Meyerson Halo: A Case Report and Review of Non-Melanocytic Hosts.

ABSTRACT:

Introduction

Meyerson phenomenon denotes a perilesional, classically eczematous halo around a pre-existing lesion, most often melanocytic. Non-melanocytic halos are uncommon and can mimic regression in a melanocytic lesion, including melanoma, leading to urgent referrals.

Case presentation

We report a 37-year-old woman with a "mole with a halo" on her arm. Examination revealed a 5-mm pink papule with a thin whitish collarette and a faint, ill-defined hypopigmented ring. Dermoscopy showed a structureless pink centre with a pinpoint crust and delicate collarette, but no pigment network or organised vascular pattern. Excisional biopsy revealed a dermal spindle-cell proliferation characteristic of dermatofibroma; the diagnosis was confirmed by negative SOX10 and positive Factor

SUBMITTER: Shanshal M 

PROVIDER: S-EPMC12818893 | biostudies-literature | 2026 Jan-Dec

REPOSITORIES: biostudies-literature