Melanomas usually begin as a flat spot that changes in size or shape or colour over months. While they remain flat they are generally curable. They usually remain flat for six to 12 months. Later, melanomas become bigger, irregular in shape and often darker in colour.
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.
The first sign of melanoma is often a mole that changes size, shape or color. This melanoma shows color variations and an irregular border, both of which are melanoma warning signs. Melanomas can develop anywhere on your body.
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. Diameter: There is a change in size, usually an increase. Melanomas can be tiny, but most are larger than the size of a pea (larger than 6 millimeters or about 1/4 inch).
Redness or new swelling beyond the border of a mole. Color that spreads from the border of a spot into surrounding skin. Itching, pain, or tenderness in an area that doesn't go away or goes away then comes back. Changes in the surface of a mole: oozing, scaliness, bleeding, or the appearance of a lump or bump.
Any change in size, shape, color or elevation of a spot on your skin, or any new symptom in it, such as bleeding, itching or crusting, may be a warning sign of melanoma.
How Fast Does Melanoma Grow? Some types of melanoma can grow very quickly, becoming life-threatening in as little as six weeks. If left untreated it can spread to other parts of the body. Nodular melanoma is a highly dangerous form of melanoma that looks different from common melanomas and can grow in just a few weeks.
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.
For melanoma, a biopsy of the suspicious skin area, called a lesion, is the only sure way for the doctor to know if it is cancer. In a biopsy, the doctor takes a small sample of tissue for testing in a laboratory.
Melanoma often starts as a new spot on your skin, but a mole you already have can turn into melanoma. A spot or mole may get bigger. A spot or mole may have an irregular, not-smooth edge or surface. A spot or mole may change colour such as brown, black, blue, red, pink, white and/or light grey.
Seborrheic keratoses are noncancerous skin growths that can look a lot like melanoma. About 83 million people in the United States have seborrheic keratosis.
Nodular melanoma (10-15% of melanomas)
It usually appears as a round, raised lump on the surface of the skin that is pink, red, brown or black and feels firm to touch. It may develop a crusty surface that bleeds easily.
Symptoms of nodular melanoma include: A firm, dome-shaped growth on your skin. Discoloration (red, pink, brown, black, blue-black or the same color as your skin). Texture may be smooth, crusty or rough, like cauliflower.
In advanced melanoma, the texture of the mole may change. The skin on the surface may break down and look scraped. The mole may become hard or lumpy and the surface may ooze or bleed. Sometimes the melanoma is itchy, tender, or painful.
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.
The risk of melanoma increases as people age. The average age of people when it is diagnosed is 65. But melanoma is not uncommon even among those younger than 30. In fact, it's one of the most common cancers in young adults (especially young women).
How fast does melanoma spread and grow to local lymph nodes and other organs? “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.”
General symptoms
hard or swollen lymph nodes. hard lump on your skin. unexplained pain. feeling very tired or unwell.
Does melanoma hurt? You can have melanoma without feeling any pain or discomfort. For many people, the only sign of this skin cancer is a spot that has some of the ABCDEs of melanoma or a line beneath a nail. Sometimes, melanoma causes discomfort.
Blood tests. Blood tests aren't used to diagnose melanoma, but some tests may be done before or during treatment, especially for more advanced melanomas. Doctors often test blood for levels of a substance called lactate dehydrogenase (LDH) before treatment.
Spread of pigment from the border of a spot into surrounding skin. Redness or a new swelling beyond the border of the mole. Change in sensation, such as itchiness, tenderness, or pain. Change in the surface of a mole – scaliness, oozing, bleeding, or the appearance of a lump or bump.
Doctors have known for decades that melanoma and many other cancer types tend to spread first into nearby lymph nodes before entering the blood and traveling to distant parts of the body.
To determine the stage of a melanoma, the lesion and some surrounding healthy tissue need to be surgically removed and analyzed using a microscope. Doctors use the melanoma's thickness, measured in millimeters (mm), and the other characteristics described in Diagnosis to help determine the disease's stage.