Dermoscopic structures	Schematic illustration	Definition (morphology)	Diagnostic associations
Glomerular vessels		Coiled vessels mimicking the glomerular apparatus of the kidney	Bowenoid actinic keratosis, Bowen disease/squamous cell carcinomaA11,A13
			Clear cell acanthoma
Hairpin vessels		U-shaped vessels	Keratinizing tumors such as keratoacanthoma and seborrheic keratosisA7,A11,A14
		Not infrequently, may be twisted on its axis
		Background: white halo common in keratinocytic tumors
		U-shaped vessels	Irritated seborrheic keratosis, melanoma, basal cell carcinomaA15
		Not infrequently, may be twisted on its axis
		Background: pink halo or pink background common in irritated seborrheic keratosis, but can also be seen in cutaneous malignancies
Arborizing vessels		Vessels with large diameter, branching irregularly into fine capillaries	Basal cell carcinomaA11, A13
			Can also be seen in cysts, furuncles, and other adnexal tumors
Crown vessels		Branching or nonbranching vessels radiating toward the center of the lesion but without crossing its center	Sebaceous hyperplasiaA11
			Molluscum contagiosum
		Often associated with white/yellowish popcorn-like globular structures
Dotted or glomerular vessels in “string of pearls” or serpiginous distribution		Vessels distributed in a serpiginous pattern	Clear cell acanthoma
Strawberry pattern		White-yellow follicular openings surrounded by a white halo, over a red background	Actinic keratosisA16