Dermoscopy of pseudoxanthoma elasticum

Description

A 22-year-old woman presented with complaints of gradually progressive yellowish asymptomatic papules coalescing to form plaques over the lateral aspects of the neck since last 3 years. There were no associated systemic complaints. No similar complaints were noted in any of the family members. Systemic examination was normal while mucocutaneous examination revealed the presence of symmetrically distributed yellowish monomorphic papules arranged in a linear and reticulate manner on both sides of the neck, axillae and periumbilical area (figure 1). These plaques were confluent at most of the places, occasionally studded with telangiectasias and had a pebble-like feel on palpation with poor elastic recoil. Polarised light dermoscopy at x10 magnification of these plaques showed multiple irregular yellowish areas alternating with multiple linear vessels. These yellowish plaques coalesced to form parallel strands (figure 2A). The fundus examination was within normal limits except diffuse pigmentary degeneration (figure...

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