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Francisco Vázquez-López, MD; Alejandro Fueyo, MD; Jesus Sánchez-Martín, MD; Narciso Pérez-Oliva, MD
Asturias Central University Hospital, University of Oviedo, Oviedo, Spain

Arch Dermatol. 2008;144(4):568.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

The lesions are from the arm of a 35-year-old man (Figure 1) (scale indicates millimeters), the trunk of a 15-year-old girl (Figure 2), the leg of a 51-year-old woman (Figure 3), and the leg of a 20-year-old woman (Figure 4). All patients had erythematous, urticariform lesions. The first 2 patients had common urticaria, and the others had urticarial vasculitis. The handheld dermoscope (x10 original magnification) serves to clinically discriminate between these diseases noninvasively. Figure 1 and Figure 2 show common urticaria dermoscopically, disclosing prominent, sometimes reticular red lines. These red lines correspond histologically with ectatic, horizontal, subpapillary vessels and are different from vascular red dots (papillary vessels). Lesions of common urticaria may also show structureless avascular areas, devoid of vascular findings, representing areas where the vessels are obscured . . . [Full Text of this Article]