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Doctor insights on: Melanoma Under Toenail Symptoms

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Dr. Mike Bowman
955 Doctors shared insights

Skin Cancer (Definition)

A condition in which some element of your skin--which is one of the most complex organs in the body--degenerates into cancer. The three most common types of skin cancer are: basal cell, squamous cell, and melanoma which occur in that order and degree of aggressiveness. Although heredity plays a major role, sun exposure and tobacco use and ...Read more


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Could I have acral lentiginous melanoma? I have a thick white nail streak on my toenail that has been there for about a year. I am half black.

Could I have acral lentiginous melanoma? I have a thick white nail streak on my toenail that has been there for about a year. I am half black.

Melanoma: Most melanomas in the nail region appear as a black or brown /black irregular streak. However, a dermatologist should examine the area to make sure acral melanoma is not present.

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Hello. I've noticed a light brown mark underneath my big toenail. No trauma that I can think of it does not hurt. Had melanoma on nose 5 yrs ago?

Hello. I've noticed a light brown mark underneath my big toenail. No trauma that I can think of it does not hurt. Had melanoma on nose 5 yrs ago?

See doctor: Melanomas can occur under nails. Given your history, it is prudent that you see a doctor to ascertain if the lesion needs to be removed.

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About 5 mm black spot on my toenail. It's on the white part (the nail where it grows). The spot grew bigger upward in 2 day. Could it be melanoma?

About 5 mm black spot on my toenail. It's on the white part (the nail where it grows). The spot grew bigger upward in 2 day. Could it be melanoma?

Trauma?: Do you remember any trauma to the toenail? A collection of blood underneath the toenail can also appear like this. The safest thing to do is to show this to your friendly dermatologist. While it would be rare of a 20 year old to have a melanoma, it does happen occasionally. Remember to protect your skin. Limit your exposure to UV radiation. Wear sunscreen with an SPF of at least 30

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5 yr old with brownish streak on toenail. Appt w/DERMATOLOGIST this Tues. Recovery time/pain if biopsied? How likely is it Melanoma for a child?

5 yr old with brownish streak on toenail. Appt w/DERMATOLOGIST this Tues. Recovery time/pain if biopsied? How likely is it Melanoma for a child?

ANSWER: Post-op pain should be minimal. Recovery should be fairly quick. To my knowledge, there may be less than ten reports in the scientific literature of subungual melanoma in kids, so not common.

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Biopsy on 3 toenails with longitudinal streaks. No evidence of melanocytes (melanoma) or fungus. Consistent with scar tissue. Patho and Dr stumped???

Biopsy on 3 toenails with longitudinal streaks. No evidence of melanocytes (melanoma) or fungus. Consistent with scar tissue. Patho and Dr stumped???

Event marker...: I wish I knew if all three toenails involved were on the same foot., or even contingent toes. Longitudinal markings do not have to be from melanoma or fungus. The streaks come from the nail matrix area. Something has caused the root to mark the the new nails as they grow. This could be from chemical, thermal or physical damage to the root areas. Sometime it's permanent and other times temporary.

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Is toenail melanoma on the nail bed, or within the nail? I had a bruise like spot (no trauma) appear, but was able to cut about half of it off.

Is toenail melanoma on the nail bed, or within the nail? I had a bruise like spot (no trauma) appear, but was able to cut about half of it off.

A streak: It appears as a dark streak in the direction the nail goes. If you have a concerning lesion under your toenail you should see your friendly dermatologist.

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I recently noticed a light brown stripe going down my thumbnail. Could it be a melanoma? I'm black & struggle with toenail fungus but not on my hands.

I recently noticed a light brown stripe going down my thumbnail. Could it be a melanoma? I'm black & struggle with toenail fungus but not on my hands.

I understand your co: Your concern is valid as melanoma in blacks affects nail beds more often than in whites. But what it is too early to tell. I would advise you to look closely at the upper end of the nail fold (near the skin junction) and see if there is any growth or redness there. Also watch this streak for any changes over the next few weeks. If it changes, i.e. Becomes darker or larger, then see a dermatologist

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Can melanoma on the foot have liquid in it?

Can melanoma on the foot have liquid in it?

No: Melanoma does not have liquid in it anywhere

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I have a 1.5 centimeter melanoma on the bottom of my foot. How serious is the depth of this?

I have a 1.5 centimeter melanoma on the bottom of my foot. How serious is the depth of this?

Thick: Melanomas are considered thin when they are less than 1 mm thick and they are considered thick when they are greater than 4 mm thick. If your melanoma is truly 1.5 cm thick, this would indeed be a very thick melanoma. Check with your doctor to be sure about the depth and that it is not 1.5 mm. A 1.5 cm melanoma would be at high risk for lymph node and distant spread and has a poor prognosis.

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I just noticed a freckle on the bottom of my foot that was not there before. How do I know if it is plantar melanoma?

I just noticed a freckle on the bottom of my foot that was not there before. How do I know if it is plantar melanoma?

See your doctor: While this might be something very benign, it is important that you see your doctor with something that is very new or changed in appearance. You might need a biopsy to determine what it is, and appropriate care started. Some skin lesions can get worse quickly (such as melanoma). Get it looked at!

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I have a dark brown flat patch on the top of my left foot formonths and two tiny patches on the right foot. I was told by afriend that its likely melanoma. Is it true?

I have a dark brown flat patch on the top of my left foot formonths and two tiny patches on the right foot. I was told by afriend that its likely melanoma. Is it true?

Any pigmented lesion: Should be examined. However, not every pigmented lesion is a melanoma. Doctors, podiatrists and dermatologists alike may use a dermascope to better study the lesion or take a biopsy if they deem it suspicious in nature. Asymmetry, irregular border color changes and diameter of lesion are all signs that are looked at.

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I'm scaeed. Can plantar warts indicate foot melanoma?

I'm scaeed. Can plantar warts indicate foot melanoma?

No: Plantar warts do not cause melanoma. However melanoma can develop on the soles of your hands and feet. See your dermatologist to make the correct diagnosis.

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How do you treat a malignant melanoma on bottom of foot?

Same treatment: Treatment will be dictated by the same features as any melanoma: physical exam for possible metastatic disease, tumor thickness, ulceration, and mitotic rate. Thus the treatment will likely include wide excision and possibly sentinel node biopsy. The main difference for this location is that reconstruction of the primary site could require skin graft or a flap.

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Dr. Arnold Beresh
340 Doctors shared insights

Toenails (Definition)

Toenails are the hard coverings at the end of the toes. Nails are made out of a protein called keratin. They function to protect the end of the toe and to increase sensitivity of touch. Good nail care is important to prevent ...Read more


Dr. Travis Kidner
2,631 Doctors shared insights

Melanoma (Definition)

Cancer of the melanocyte cells. Melanocyte cells determine the color of your skin. Although these cells are primarily found in your skin, they can also be found in the bowel ...Read more