
A 42-year-old woman, who works as a dishwasher at a restaurant, has a 6-month history of a greenish nail on her left toe. The discoloration is an isolated clinical finding. She is not taking any medications and her medical history is unremarkable.
The most likely diagnosis is
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Pseudomonas aeruginosa infection
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Chronic nail trauma
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Tinea unguium
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Malignant melanoma
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Subungual hematoma
Answer on page 1104
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