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Sir, Dermatoscopy was introduced in dermatology to support the clinical diagnosis of pigmented skin lesions, and after a long period of development it is now commonly used in dermatological practice (1± 5). Porokeratosis of Mibelli (PM), a dermatosis characterized by an alteration of epidermal keratinisation, has a wide variety of morphological clinical presentations: classic PM, linear PM and punctate PM (6). It is characterized by single or by a few papules and plaques, varying in size, with elevated borders and a slightly evident longitudinal furrow, usually located in the extremities; their central portion is generally hypopigmented, hairless and atrophic. The histopathological hallmark is the presence at the borders of the lesions of the cornoid lamella, formed by parakeratotic cells ® lled in invaginations of epidermis through the orthokeratotic stratum corneum (6, 7). We performed a dermatoscopic examination in 10 patients with classic PM in order to point out dermatoscopic features enabling a nonFig. 1. Dark-brown close globules and dots (arrowhead) circumscribinvasive diagnosis, always taking into account the clinicoing a central hypopigmented scar-like area (asterisk) with multiple pathological correlation. scattered brown globules and dots (arrowhead). Red dots (arrow) in the centre of the lesions ( 3 50 lens).

Videodermatoscopic Approach to Porokeratosis of Mibelli: A Useful Tool for the Diagnosis