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What is All are possible diagnoses in these changes in nails except? and explain in detail?
In patients with Wilson's disease lunula of nail takes on a blue coloration which is called as azure lunula. Excessive fluoride ingestion can turn nails brown or black. Causes of black nails : Systemic Addison's disease Cushing's disease AIDS Alkaptonuria /Ochronosis Irradiation Secondary syphilis Nelson syndrome Dermatological Amyloid (primary) Basal cell carcinoma/Bowen's disease Lichen planus Malignant melanoma Peutz- Jeghers-Syndrome Porphyria cutanea tarda Radiotherapy and radiodermatitis