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​Symptoms and Signs – Differential Diagnosis of Hyperpigmentation
• Psoralen plus ultraviolet A (PUVA) therapy (psoralen administration) for psoriasis and vitiligo
• Progressive systemic sclerosis and related conditions
• Pregnancy
• Porphyrias (porphyria cutanea tarda and variegate porphyria)
• Pheochromocytoma
• Melanotropic hormone injection
• Melanoma
• Malabsorption syndrome (Whipple’s disease and celiac sprue)
• Hemochromatosis (“bronze” diabetes)
• Drug induced (e.g., antimalarials, some cytotoxic agents)
• Arsenic ingestion
• Adrenocorticotropic hormone (ACTH)– or melanocyte-stimulating hormone (MSH)–producing tumors (e.g., small cell carcinoma of the lung)
• Addison’s disease
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Kembara Xtra 

Facts about medicine and its subtopic such as anatomy, physiology, biochemistry, pharmacology, medicine, pediatrics, psychiatry, obstetrics and gynecology and surgery.