Where are acral lentiginous melanomas typically found?

Where are melanomas most commonly found?

Melanomas can develop anywhere on your body. They most often develop in areas that have had exposure to the sun, such as your back, legs, arms and face. Melanomas can also occur in areas that don’t receive much sun exposure, such as the soles of your feet, palms of your hands and fingernail beds.

What is acral melanoma?

Acral lentiginous melanoma is a rare type of skin cancer. It begins when the melanocytes in the skin grow out of control and form tumors. Melanocytes are the cells responsible for making melanin, the pigment that determines the color of the skin.

Does acral lentiginous melanoma spread?

Acral lentiginous melanoma causes

A tumor will continue to grow and spread until it’s removed. Unlike other forms of melanoma, acral lentiginous melanoma is not associated with excess sun exposure. It’s believed that genetic mutations contribute to the development of acral lentiginous melanoma.

What percentage of melanoma in Caucasians are acral lentiginous?

Acral lentiginous melanoma (ALM), occurring on the hands and feet (palms, soles, fingers, toes, and nail units) was first defined as a distinct subtype of cutaneous melanoma (CM) by Arrington et al. (1977). It is the least common subtype of CM comprising only about 2.5% of total melanoma diagnoses in Caucasians.

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Can you have melanoma for years and not know?

How long can you have melanoma and not know it? It depends on the type of melanoma. For example, nodular melanoma grows rapidly over a matter of weeks, while a radial melanoma can slowly spread over the span of a decade. Like a cavity, a melanoma may grow for years before producing any significant symptoms.

Where is the most common site for melanoma in females?

In women, the legs—particularly the lower legs—are the most common area for melanoma to occur. If you check regularly and find melanoma in the early stages, it’s highly treatable. So be sure to look at the backs of your legs and your ankles and feet as well. And remember sunscreen when your legs are exposed.

How long does it take acral lentiginous melanoma to spread?

The duration of time starting from when these patients first noticed the pigmented lesions up to when they first visited the clinic ranged from 5 to 30 years (average duration: 13.3 years).

How fast does foot melanoma spread?

Melanoma can grow very quickly. It can become life-threatening in as little as 6 weeks and, if untreated, it can spread to other parts of the body. Melanoma can appear on skin not normally exposed to the sun. Nodular melanoma is a highly dangerous form of melanoma that looks different from common melanomas.

Can acral lentiginous melanoma be benign?

In their review of 712 acral melanocytic lesions, Saida and Miyzaki found the parallel ridge pattern and irregular diffuse pigmentation positively predicted melanoma over 93.7 percent of the time. Conversely, the authors found the parallel furrow pattern lesions were benign over 93.2 percent of the time.

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Is acral lentiginous melanoma fast growing?

It is more common on feet than on hands. It can arise de novo in normal-appearing skin, or it can develop within an existing melanocytic naevus (mole). Acral lentiginous melanoma starts as a slowly-enlarging flat patch of discoloured skin.

How aggressive is acral lentiginous melanoma?

Acral lentiginous melanoma is a very aggressive, malignant cutaneous tumor which has a predilection for the plantar surface of the feet, palms of the hand, and the digits. The lesion presents as a rapidly spreading, darkly pigmented patch and may display varying degrees of pigmentation.

What does lentigo melanoma look like?

The visual symptoms of lentigo maligna melanoma are very similar to those of lentigo maligna. Both look like a flat or slightly raised brown patch, similar to a freckle or age spot. They have a smooth surface and an irregular shape. While they’re usually a shade of brown, they can also be pink, red, or white.