Slideshow
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Synovial cyst
Typically painless, treatment involves draining and removing the cyst.
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Psoriasis of the nail
A large increase in the speed of epidermal cell production causes scaly patches to form on the nails. Psoriasis may be caused by infection, stress, or be drug-induced.
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Clubbed fingers
Clubbing (acropachy) often occurs as a symptom of conditions associated with a decrease in oxygen levels of the blood (e.g., kidney failure, lung disorders, bowel disease, and some heart disorders).
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Discolored nails
This patient
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Beau
A Beau
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Psoriasis of the nail
Psoriasis occurs when excessive growth of skin cells leads to plaques of itchy, scaly, and thickened skin that may become infected.
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Onychogryphosis
Onychogryphosis is a distortion of the toenails attributable to chronic irritation and inflammation.
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Melanonychia
The two types of melanonychia, a nail discoloration caused by melanin are transverse and longitudinal (shown here), which may be a sign of subungual melanoma.
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Onychomycosis (tinea unguium)
Tineal infections are caused by dermatophytes and may be acquired from an infected person, an animal, soil, or shower floors.
Understanding nail disorders, how to treat them, and when to refer to a dermatology specialist are essential skills for the primary-care clinician.