Table 2.

Conditions associated with longitudinal erythronychia [1–4, 6–8, 11–13, 17–43]

Monodactylous longitudinal erythronychia	Polydactylous longitudinal erythronychia
Benign subungual tumors	Cutaneous conditions
Glomus tumor	Acantholytic dyskeratotic epidermal nevus
Onchyopapilloma	Acantholytic epidermolysis bullosa
Warty dyskeratoma	Acrokeratosis verruciformis of Hopf
Cutaneous conditions	Darier’s disease
Darier’s disease	Lichen planus
Postsurgical scar	Systemic diseases
Malignant subungual tumors	Amyloidosis
Malignant melanoma	Graft-versus-host disease
Subungual amelanotic melanoma	Pseudobulbar syndrome
Squamous cell carcinoma
Systemic diseases
Amyloidosis
Hemiplegia