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A female asked:

Several weeks ago, i've discovered a black dotted straight very thin line underneath the nail (left thumb). is it fungus, cancer, or liver disease?

1 doctor answer2 doctors weighed in
Dr. Gurmukh Singh
Pathology 49 years experience
Need more info: It is not feasible to provide a meaningful answer without examining you. It is not likely to be fungus or liver disease. Cannot rule out melanoma. It would be prudent to see your doctor.

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Last updated Mar 18, 2015

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