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A Dermoscopy Subpattern of Plaque-Type Psoriasis Red Globular Rings

Francisco Vázquez-López, MD; Pedro Zaballos, MD; Alejandro Fueyo-Casado, MD; Jesus Sánchez-Martín, MD
Arch Dermatol. 2007;143(12):1612. doi:10.1001/archderm.143.12.1612.
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The lesions shown are from the leg of a 55-year-old man (Figure 1), the leg of a 34-year-old woman (Figure 2), the arm of a 45-year-old man (Figure 3), and the trunk of a 40-year-old man (Figure 4). All of these lesions reveal a similar dermoscopic subpattern (original magnification ×10): presence of round capillaries (red globules) arranged in irregular circles or rings with a beaded, lacelike capillary appearance. Histologically, the red globules represent the view from the top of the tortuous, plentiful, coiled, ectatic, and elongated capillaries within the thin, elongated, psoriatic dermal papillae, which are the vascular basis of the Auspitz sign. Characteristically, the dilated red globules are regularly and uniformly distributed along the psoriatic plaque. The ring pattern illustrated herein is infrequent and represents a dermoscopic subpattern of plaque-type psoriasis.

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