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Glossary Blaschko's lines

invisible skin patterns from embryonic cell migration

Blaschko's lines are invisible patterns on human skin that become apparent in certain skin conditions or diseases. These lines represent the pathways of embryonic cell migration and are typically V-shaped on the back, S-shaped on the abdomen, and wavy on the head and extremities. They are not usually visible under normal conditions but can become evident in disorders like lichen planus or epidermal nevi.

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Research

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research Linear lupus panniculitis of the scalp presenting as alopecia along Blaschko’s lines: A distinct variant of lupus panniculitis in East Asians?

34 citations , December 2011 in “The Journal of Dermatology”

This study describes a distinct variant of lupus panniculitis in East Asians, characterized by reversible, linear alopecia along Blaschko’s lines on the scalp, without systemic lupus erythematosus associations.

research Distinctive lupus panniculitis of scalp with linear alopecia along Blaschko's lines: a review of the literature

19 citations , August 2018 in “International Journal of Dermatology”

In this study, lupus panniculitis of the scalp was associated with a high incidence of recurrence and progression to systemic lupus erythematosus, despite various treatments showing complete response within weeks.

research Linear Cutaneous Lupus Erythematosus Following Blaschko’s Lines on the Scalp: Additional Cases and Review of the Literature

1 citations , April 2022 in “HCA Healthcare Journal of Medicine”

This article reviews 16 known cases of Blaschkoid linear lupus of the scalp, reports 2 new cases, and finds this subtype has distinct clinical and histological features that aid diagnosis.

research Unilateral widespread lichen planus following Blaschko's lines afterMycoplasma pneumoniaeinfection

1 citations , September 2013 in “The Journal of Dermatology”

An 8-year-old girl developed a rare skin condition in a linear pattern on one side of her body after a lung infection, which improved with treatment.

research Linear and Unilateral Basaloid Follicular Hamartoma Along Blaschko’s Lines in an Elderly Patient: A Rare Presentation

June 2025 in “Indian Journal of Dermatology”

This article reports a case of late onset linear and unilateral basaloid follicular hamartoma in an elderly male, highlighting the clinical presentation, histopathological findings, and planned treatment approach.

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