Extensive pigmentary mosaicism along Blaschko lines. In patients with generalized streaks and swirls, it can be difficult to determine whether the "abnormal" skin is hypo- or hyperpigmented.
From: Molho-Pessach V, Schaffer JV. Blaschko lines and other patterns of cutaneous mosaicism. Clin Dermatol 2011; 29:205. Illustration used with the permission of Elsevier Inc. All rights reserved.
