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Related Experiment Video

Updated: May 22, 2026

Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus

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Published on: May 16, 2025

Dermatofibroma and halo dermatitis.

Clare Schofield¹, David Weedon, Sandeep Kumar

¹Royal Hobart Hospital, Hobart, Tasmania, Australia. ccschofield@hotmail.com

The Australasian Journal of Dermatology

|May 11, 2012

Summary

The Meyerson phenomenon, or halo dermatitis, is an inflammatory reaction around skin lesions. This rare case shows it can occur around dermatofibromas, not just moles, broadening its known clinical relevance.

Area of Science:

Dermatology
Dermatopathology

Background:

The Meyerson phenomenon, characterized by a halo of dermatitis, was first described around acquired naevi.
Histological features include spongiosis, parakeratosis, acanthosis, and a lymphocytic infiltrate.

Observation:

A rare case of Meyerson phenomenon occurred around a dermatofibroma in a 69-year-old woman.
This presentation is unusual as the phenomenon is typically associated with acquired naevi.

Findings:

The Meyerson phenomenon can manifest around various cutaneous lesions beyond acquired naevi.
Histopathological examination confirmed the characteristic inflammatory changes of halo dermatitis surrounding the dermatofibroma.

Implications:

This case expands the clinical spectrum of the Meyerson phenomenon.

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Dermatologists should consider halo dermatitis in the differential diagnosis for inflammatory reactions around diverse skin lesions, not exclusively in younger individuals or around naevi.