Linear porokeratosis presents as a lesion following which pattern?

• A. Radial pattern
• B. Spiral pattern
• C. Linear pattern along the lines of Blaschko
• D. Irregular pattern

Answer: (C)

Linear porokeratosis is characterized by lesions that develop in a linear pattern, specifically following the lines of Blaschko. These lines represent the pathways of embryonic skin development and the distribution of skin cells. In linear porokeratosis, the keratotic lesions typically appear as a band-like arrangement on the skin, which aligns with the Blaschko lines. This unique distribution pattern is a hallmark of several skin conditions that exhibit a genetic mosaicism or somatic mutation.

Understanding this pattern is crucial for accurate diagnosis and management. The linear arrangement contrasts with other potential patterns seen in dermatological conditions, emphasizing the specific nature of linear porokeratosis. This specificity aids in distinguishing it from other skin disorders that may present with similar lesions but follow different distributions.