Melanonychia

What is Melanonychia?

Melanonychia is a black or brown pigmentation of the normal nail plate, and may be present as a normal finding on many digits in black patients, as a result of trauma, systemic disease, or medications, or as a postinflammatory event from such localized events as lichen planus or fixed drug eruption.

There are two types, longitudinal and transverse melanonychia. Longitudinal melanonychia may be a sign of subungual melanoma (Acral lentiginous melanoma), although there are other diagnoses such as chronic paronychia, onychomycosis, subungual hematoma, pyogenic granuloma, glomus tumour, subungual verruca, mucous cyst, subungual fibroma, keratoacanthoma, carcinoma of the nail bed, and subungual exostosis.

Questions and answers on "Melanonychia"

I have a thin black line in my right thumbnail. And a slight dent in the middle of my nail where the black line is. Should i be concerned...

doctor1 MD

Brief Answer:
Longitudinal melanonychia and its causes

Detailed Answer:
Hi
Thanks for being at HealthcareMagic
I have reviewed the attached...

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if i have a dark line on my thumb nail do have Syphilis i have no other signs and have not been active over 6...

doctor1 MD

Brief Answer:
not syphilis

Detailed Answer:
Hello
Thanks for the query.
Just relax a single dark line on nail is not significant.
It is not a sign...

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Hello Doc,

I am XXXXXXX An XXXXXXX a vegetatrian (recently started eating egg). I am living in Japan.

After coming to Japan an year ago. I feeI, I...

doctor1 MD

Brief Answer:
Regarding your concerns related to nail and skin

Detailed Answer:
Hello. Thank you for writing to us

I am Dr..Kakkar (Dermatologist...

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Recent questions on  Melanonychia

doctor1 MD

I have noticed very faint line on my fingertips Picture attached. I’m concerned it might be subungual melanoma . Please advise

doctor1 MD

Hello Doc, I am XXXXXXX An XXXXXXX a vegetatrian (recently started eating egg). I am living in Japan. After coming to Japan an year ago. I feeI, I...

doctor1 MD

I have a thin black line in my right thumbnail. And a slight dent in the middle of my nail where the black line is. Should i be concerned...

doctor1 MD

Hi I have a black line on my thumb nail. Iv looked on the internet. And it is saying it s skin cancer. Can you please tell me if it is skin cancer....

doctor1 MD

My son went to dr at college for what is called longitudinal melanonychia. He has had it a while and didn t realize it was something ro be...

doctor1 MD

HI, Im a 20 year old female. I had ultra severe dyshidrotic eczema on my left ring finger this winter. The traumatizing photos on google image...

doctor1 MD

Hi Doctor , Good morning. Just 1 day before I noticed that some brown marks are appearing in the nearby tissues( just in the side edge of nail ) of...

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