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www.medicalnewstoday.com/articles/319100

Subungual melanoma often starts as a brown or black streak under a toenail or fingernail. A person may mistake it for a bruise. The main symptoms associated with subungual melanoma are the following:

www.painful-feet.com/symptoms/toenail-melanoma

Toenail fungus is a more common problem that you might experience, however, it is more easily identified compared to a melanoma.. Toenails that are infected usually become thicker, change size or shape, become lighter in color (yellow and brown) and have scaly, brittle edges.

www.webmd.com/skin-problems-and-treatments/ss/slideshow-toenail-color-causes

Black Toenail: Common Causes. If your toenail turns black, it’s most likely a bruise under the nail, technically called a subungual hematoma. You can get it from stubbing a toe or from footwear ...

www.healthline.com/health/toenail-problems

Symptoms . Symptoms of toenail trauma depend on the type of injury and may include: pain or throbbing; dark red or purple spot under the nail; ... Drugs, including some cancer drugs, antibiotics ...

www.healthline.com/health/subungual-melanoma

Subungual melanoma is a type of melanoma in the nails. Unlike other types of nail melanoma that grow in the surrounding skin, this type begins in the nail matrix.

www.virotherapy.com/blog/nail-discoloration-and-other-signs-of-subungual-melanoma

Subungual Melanoma is most easily defined as a cancer of the nail unit. Identified as one of the three main types of nail cutaneous cancer, subungal melanomas is the only one that originates from the tissue beneath the nail base, known as the nail matrix. Within the medical community, it is also referred to as Malignant Subungual Melanoma ...

www.today.com/health/7-nail-symptoms-explained-signs-you-shouldn-t-ignore-t105511

Here are seven nail symptoms and what to do next: 1. Symptom: Brown vertical stripe on the nail. This may be a sign of melanoma. While you may think the deadliest type of skin cancer always shows ...

www.mayoclinic.org/diseases-conditions/melanoma/symptoms-causes/syc-20374884

When melanoma occurs in people with darker skin, it's more likely to occur in a hidden area. Hidden melanomas include: Melanoma under a nail. Acral-lentiginous melanoma is a rare form of melanoma that can occur under a fingernail or toenail. It can also be found on the palms of the hands or the soles of the feet.

www.medicalnewstoday.com/articles/322735

Nail abnormalities can be a sign of different conditions that need medical attention and treatment. Many nail abnormalities are harmless while some are signs of health conditions.

www.dermnetnz.org/topics/melanoma-of-nail-unit

Introduction. Melanoma of the nail unit is usually a variant of acral lentiginous melanoma (melanoma arising on the palms of the hands and soles of the feet). Other types of melanoma rarely arising under the nails are nodular melanoma and desmoplastic melanoma.. Melanoma of the nail unit usually affects either a thumbnail or great toenail, but any finger or toenail may be involved.