Table I.

Differential diagnosis of nail bed nodules and their dermatoscope findings

Differential diagnosis of nail bed nodules	Dermatoscope findings
Glomus tumor	Discrete linear vascular structures Ramified telangiectasia on nail bed and matrix Pinkish or bluish hue
Onychomatrichoma	Longitudinal parallel white lines Splinter hemorrhages Free-edge nail pitting Thickening of the free edge
Amelanotic melanoma	Vessels: dotted, hairpin, irregular-linear, polymorphous Pink areas or globules Multiple blue-gray dots Shiny white lines Blue-white veil
Squamous cell carcinoma	White, yellow, light brown structureless areas White circles Vessels: glomerular, hairpin, irregular-linear Ulceration