| 色素性境界線(pigmentary demarcation lines) 色素性境界線在有色人種頗為常見，有時會被誤認為分節性白斑，但色素細胞數目在色素淺處並不會較少。在軀幹或上臂產生境界對比明顯的色差，共可分為七種，以第一型最多，又稱為Voigt's line，黑人高達20-26%有此現象，又稱為Futcher's line。 在懷孕中色素線往往會變得更明顯。 Types of pigmentary demarcation lines
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| A | Lateral aspect of upper anterior portion of the arms across the pectoral area | | B | Posteromedial portion of the lower limb | | C | Vertical hypopigmented line in pre and parasternal areas | | D | Posteromedial area of the spine | | E | Bilateral aspect of the chest, from the mid-third of the clavicel to the periareolar skin | | F | Straight or curved convex line sharply demarcating a relatively darker zone from a lighter area on the face |
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色素性境界線(pigmentary demarcation lines)
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