From: Chemotherapy-related striate melanonychia: a case report
Melanocytic activation in the nail matrix | |
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Physiologic causes | Racial Pregnancy |
Local and regional causes | Repeated local trauma from poor footwear or overriding toes Onychotillomania Nail biting Occupational trauma Carpal tunnel syndrome |
Dermatologic causes | Onychomycosis Chronic paronychia Psoriasis Lichen planus Amyloidosis Chronic radiation dermatitis Systemic lupus erythematosus Localized scleroderma Onychomatricoma Bowen’s disease Myxoid pseudocyst Basal cell carcinoma Subungual fibrous histiocytoma Verruca vulgaris Subungual linear keratosis |
Systemic causes | Endocrine (Addison’s, Cushing’s syndrome) Nelson’s syndrome, hyperthyroidism, acromegaly Alcaptonuria Nutritional disorders Hemosiderosis Hyperbilirubinemia Porphyria Graft versus host disease AIDS |
Iatrogenic causes | Phototherapy X-ray exposure Electron beam therapy Drug intake |
Syndromes | Laugier-Hunziker syndrome Peutz-Jeghers syndrome Touraine syndrome |
Melanocytic hyperplasia in the nail matrix | |
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Benign | Congenital nevi Acquired nevi Nail lentigo |
Neoplasm | Subungual melanoma in situ Subungual melanoma Subungual pigmented Bowen disease Subungual pigmented squamous cell carcinoma |