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A 19-year-old male asked:

i have a thin black vertical line along my entire fingernail that grows after trimming it, but doesn't change in width. could this be cancer?

2 doctor answers6 doctors weighed in
Dr. Michael Thompson
Hematology and Oncology 20 years experience
Fingernails...: Fingernails can give clues to systemic (whole body) diseases. Here is one reference from mayo -- slide show: 7 fingernail problems not to ignore --http://www.Mayoclinic.Com/health/nails/wo00055&slide=7 -- your primary md may be able to help diagnose further.
Dr. Binh Ngo
Dr. Binh Ngo answered
Dermatology 18 years experience
See a dermatologist: You need to visit a dermatologist to evaluate the area. It could be blood underneath your nail cause by trauma when trimming the nails or fungus. You may need a biopsy of the nail to make sure that this is not a melanoma. This is the most deadly of all the skin cancers.
Dr. Ed Friedlander
Pathology 44 years experience
This is very good advice . We need to rule out melanoma.
Feb 22, 2013

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