title: Dermoscopy of Pitted Keratolysis.
abstract: Irritated hyperhidrotic soles with multiple small pits are pathognomonic for pitted keratolysis (PK). Here we show the dermatoscopic view of typical pits that can ensure the diagnosis. PK is a plantar infection caused by Gram-positive bacteria, particularly Corynebacterium. Increases in skin surface pH, hyperhidrosis, and prolonged occlusion allow these bacteria to proliferate. The diagnosis is fundamentally clinical and treatment generally consists of a combination of hygienic measures, correcting plantar hyperhidrosis and topical antimicrobials.
authors.affiliation: Department of Dermatology, University Hospital of Zurich, Zurich, Switzerland.
authors.forename: Lauren L
authors.initials: LL
authors.lastname: Lockwood
authors.forename: Samuel
authors.initials: S
authors.lastname: Gehrke
authors.forename: Alexander A
authors.initials: AA
authors.lastname: Navarini