A member 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?

6 doctors weighed in across 2 answers
Dr. Michael Thompson answered

Specializes in Hematology and Oncology

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.

Answered 5/22/2018

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Dr. Binh Ngo answered

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.

Answered 5/23/2016

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