Health on MSN4mon
What Causes a Black Line on Your Nail (Melanonychia)?
Repeated trauma to the nail matrix from chronic nail biting or picking ... your risk of developing black lines on your nails.
Medscape1mon
Melanoma and squamous cell carcinoma on different nails of the same hand.
on different nails on the same hand, each featuring an unusual clinical presentation: amelanotic melanoma presenting as longitudinal erythronychia and squamous cell carcinoma in situ presenting as ...