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Updated: Jun 2, 2026

Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus

Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus

Published on: May 16, 2025

Idiopathic polydactylous longitudinal erythronychia.

Philip R Cohen¹

¹The University of Houston Health Center, University of Houston, Houston, Texas; The Department of Dermatology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas; and The Department of Dermatology, University of Texas-Houston Medical School, Houston, Texas.

The Journal of Clinical and Aesthetic Dermatology

|May 3, 2011

Summary

This summary is machine-generated.

Idiopathic polydactylous longitudinal erythronychia is a benign nail condition presenting as red bands on multiple nails. This common finding in men over 50 is usually asymptomatic and has no adverse effects.

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Last Updated: Jun 2, 2026

Dermoscopy Aids in the Diagnosis of Discoid Lupus Erythematosus

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Published on: May 16, 2025

Area of Science:

Dermatology
Nail Diseases
Clinical Medicine

Background:

Longitudinal erythronychia (LE) is a linear red band on the nail plate.
Idiopathic polydactylous longitudinal erythronychia (IPLE) is a rare LE variant affecting multiple digits without underlying disease.

Observation:

IPLE was observed in 1% of adult dermatology patients, predominantly men over 50.
Affected nails (3-10 digits) showed narrow bands (<1mm) or wider bands (4-6mm).
Associated nail changes included hyperkeratosis, fissuring, leukonychia, red lunula, and splinter hemorrhages.

Findings:

IPLE is a benign, asymptomatic condition of unknown cause.
It presents as linear red bands on multiple digits, often unnoticed by patients.
No association with subungual tumors, dermatological, or systemic diseases was found.

Implications:

IPLE is a common, benign nail finding, possibly age-related.
It does not appear to have associated local or systemic adverse effects.
Understanding IPLE aids in accurate diagnosis and reassurance of patients presenting with nail changes.