JAMES M.GRICHNIKMD, PhD
The illustrated port-wine stain (PWS) lesions are from the leg of a 14-year-old girl (Figure 1), the face of a 25-year-old woman (Figure 2) (scaled in millimeters), the neck of an 11-year-old boy (Figure 3), and the face of a 15-year-old girl (Figure 4). The dermoscope serves herein to determine the depth of ectasia of the PWS and to help predict the outcome of its treatment. Two different dermoscopic vascular patterns are illustrated. Figure 1 and Figure 2 disclose red linear vessels and represent the deep, subpapillary form of PWS, showing horizontally oriented capillaries. Figure 3 and Figure 4 show red, rounded, globular vessels and represent the superficial or papillary form of PWS, disclosing vertically oriented capillaries. This differentiation has prognostic significance because superficial, papillary PWS responds best to laser therapy. These cases illustrate the 2 different patterns of PWS lesions under dermoscopy.
Vázquez-López F, Coto-Segura P, Fueyo-Casado A, Pérez-Oliva N. Dermoscopy of Port-Wine Stains. Arch Dermatol. 2007;143(7):962. doi:10.1001/archderm.143.7.962