How slowly can melanoma grow?

The lesion can grow slowly for 5 to 15 years in the in situ form before becoming invasive. The exact percentage of lentigo maligna lesions that progress to invasive lentigo maligna melanoma is unknown but is estimated to be less than 30% to 50%.

How long does it take for melanoma to get bigger?

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.

Can you have a melanoma for years?

Like a cavity, a melanoma may grow for years before producing any significant symptoms.

Is melanoma slow growing?

Superficial spreading melanoma presents as a slowly growing or changing flat patch of discoloured skin. At first, it may resemble a melanocytic naevus (mole), ephelis (freckle), or lentigo. It becomes more distinctive in time, often growing over months to years or even decades before it is recognised.

What does Stage 1 melanoma look like?

Stage I melanoma is no more than 1.0 millimeter thick (about the size of a sharpened pencil point), with or without an ulceration (broken skin). There is no evidence that Stage I melanoma has spread to the lymph tissues, lymph nodes, or body organs.

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Can melanoma be flat?

The most common type of melanoma usually appears as a flat or barely raised lesion with irregular edges and different colours. Fifty per cent of these melanomas occur in preexisting moles.

How fast can melanoma change stages?

“Melanoma can grow extremely quickly and can become life-threatening in as little as six weeks,” noted Dr. Duncanson. “If left untreated, melanoma begins to spread, advancing its stage and worsening the prognosis.”

What does a melanoma spot look like?

Border that is irregular: The edges are often ragged, notched, or blurred in outline. The pigment may spread into the surrounding skin. Color that is uneven: Shades of black, brown, and tan may be present. Areas of white, gray, red, pink, or blue may also be seen.

How fast does lentigo maligna melanoma grow?

It grows slowly in diameter over 5 to 20 years or longer. Lentigo maligna melanoma is diagnosed when the melanoma cells have invaded into the dermis and deeper layers of skin. Lentigo maligna has a lower rate of transformation to invasive melanoma than the other forms of melanoma in situ (under 5% overall).

How small can a melanoma be?

All melanomas have a diameter lower than 5 mm, with a mean of 3.7 mm (range 2.5–4.5 mm).

Can a melanoma just appear suddenly?

Melanoma may suddenly appear without warning, but can also develop from or near an existing mole. It can occur anywhere on the body, but is most common on the upper back, torso, lower legs, head, and neck.