Rare Dermoscopic Vascular Manifestations of Clonal Seborrheic Keratosis: A Case Report

Clonal seborrheic keratosis (SK) represents a rare histological subtype of seborrheic keratosis that is challenging to distinguish from conventional SK and other skin neoplasms based solely on clinical presentation and dermoscopic features. Current clinical observations indicate that vascular-related manifestations in this subtype are exceedingly rare. Our report herein reports the uncommon globular vascular findings identified on dermoscopic examination of clonal SK, which not only holds great significance for the diagnosis and differential diagnosis between clonal SK, ordinary SK and other cutaneous tumors, but also provides strong support for the development of standardized dermoscopic diagnostic criteria and treatment advice for clonal SK.