Blaschko's lines
Pronunciation: BLASH-koh lines
Developmental patterns on the skin following embryonic cell migration, visible when certain skin disorders follow these pathways.
Full Definition
Blaschko's lines represent the developmental pattern of skin cell migration during embryogenesis, creating invisible lines that become apparent when certain skin conditions follow these pathways. In pediatric dermatology, recognition of Blaschko's line distribution is crucial for diagnosing various genodermatoses, epidermal nevi, and mosaic conditions. These lines differ from dermatomes and follow characteristic V-shaped patterns on the back, S-shaped curves on the abdomen, and spiral patterns on the extremities. Proper documentation includes accurate description of the distribution pattern.
Usage
Usage note: Named after Alfred Blaschko. Always use the possessive form 'Blaschko's lines' in clinical documentation.
In Context
- "The epidermal nevus followed Blaschko's lines in a spiral pattern down the child's right leg." — dermatology examination note
- "Recognition of the Blaschko's line distribution suggested a mosaic pattern rather than a symmetric eruption." — clinical assessment documentation