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A 48-year-old male asked:

dark line across toenail

2 doctor answers5 doctors weighed in
Dr. Arnold Beresh
Podiatry 41 years experience
See below: Could be beginning of fungus or due to trauma causing nail seperation.
Dr. Thomas Graziano
Podiatry 39 years experience
Nail discoloration : A dark line across your nail may have a variety of causes. Trauma to the nail plate from athletic activity may cause some subungual (under the nail) bleeding. If this the source in time a clear nail will grow out. A fungal infection can cause this as well. A specialist will determine if a biopsy is necessary to rule out a relatively less common but more serious condition such as a melanoma.

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Possible desmoid?: Most fibromatoses of the foot occurs on the bottom (plantar) surface. There is a type of benign tumor that is very invasive called a desmoid fibromatosis or desmoid tumor. I would be concerned that a lump on the top (dorsal) surface of the foot could be this, which is aggressive. A ganglion cyst is another possibility. See a doctor for possible imaging and biopsy.
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A 27-year-old male asked:

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Last updated Aug 14, 2019

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