Fig. 4.

Representative PWS cases evaluated by dermoscopy before and after 1 session of HMME-PDT. a1–d1 Clinical photographs obtained before HMME-PDT. a2–d2 Clinical photographs obtained after HMME-PDT. a3–d3 Dermoscopic images before HMME-PDT. a4–d4 Dermoscopic images after HMME-PDT. a1–a4 The type I vascular pattern, with “excellent improvement”; b1–b4 the type II vascular pattern, with “moderate improvement”; c1–c4 the type III vascular pattern, with “poor improvement”; d1–d4 the type IV vascular pattern with “good improvement” after HMME-PDT