A blue nevus is a benign mole that may easily be mistaken for melanoma. It is a blue-black, smooth, raised nodule that commonly occurs on the buttocks, hands, or feet. The dark blue color results from the refraction of the light from the pigment being deeper in the skin than most brown moles.
Seborrheic keratoses are noncancerous skin growths that can look a lot like melanoma. About 83 million people in the United States have seborrheic keratosis.
Basal cell carcinoma and squamous cell carcinoma are sometimes grouped together and called keratinocyte carcinoma. This is because they begin in a type of skin cell called a keratinocyte. In this guide, "non-melanoma skin cancer" refers to keratinocyte carcinoma and Merkel cell cancer to distinguish them from melanoma.
This early melanoma could be mistaken for a mole, so it's important to look carefully at the spots on your skin.
Pigment, redness or swelling that spreads outside the border of a spot to the surrounding skin. Itchiness, tenderness or pain. Changes in texture, or scales, oozing or bleeding from an existing mole. Blurry vision or partial loss of sight, or dark spots in the iris.
Talk to your doctor if you notice changes in your skin such as a new growth, a sore that doesn't heal, a change in an old growth, or any of the A-B-C-D-Es of melanoma. A change in your skin is the most common sign of skin cancer. This could be a new growth, a sore that doesn't heal, or a change in a mole.
The procedure that your dermatologist uses to remove the spot is called a skin biopsy. Having a skin biopsy is essential. It's the only way to know whether you have skin cancer. There's no other way to know for sure.
How melanoma is diagnosed. 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.
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 typically begins as a mole and can occur anywhere on the body. Squamous cell carcinoma may appear as a firm red bump, a scaly patch, or open sore, or a wart that may crust or bleed easily. Basal cell carcinoma may appear as a small white or flesh-colored bump that grows slowly and may bleed.
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).
Look for moles with irregular shapes, such as two very different-looking halves. B is for irregular border. Look for moles with irregular, notched or scalloped borders — characteristics of melanomas. C is for changes in color.
Despite their appearance, the big difference between seborrheic keratosis vs. melanoma is that seborrheic keratoses are harmless, noncancerous growths that can appear as you age. Whereas, melanoma is the most serious type of skin cancer.
A visual check of your skin only finds moles that may be cancer. It can't tell you for sure that you have it. The only way to diagnose the condition is with a test called a biopsy. If your doctor thinks a mole is a problem, they will give you a shot of numbing medicine, then scrape off as much of the mole as possible.
Blood Tests
If melanoma has become invasive, the patient is likely to have a higher than normal blood level of lactate dehydrogenase (LDH). The results of this test will affect staging of the melanoma and the course of treatment.
Hypothesis-based, informal guidelines recommend treatment within 4–6 weeks. In this study, median surgical intervals varied significantly between clinics and departments, but nearly all were within a 6-week frame. Key words: melanoma, surgical interval, treatment time, melanoma survival, time factors.
“Even though we think of malignant melanoma as being large, it can appear initially as a small, dark spot that just looks creepy,” says Dr. Shamban. Melanomas can be tiny black dots that are no bigger than a pen tip.
These cells produce melanin, the dark pigment that gives skin its color. Most melanomas are black or brown in color, but some are pink, red, purple or skin-colored. About 30% of melanomas begin in existing moles, but the rest start in normal skin.
What are the signs of late-stage skin cancer? Melanoma is considered stage 4 when it has metastasized to lymph nodes in a part of the body far from the original tumor or if it has metastasized to internal organs like the lungs, liver, brain, bone or gastrointestinal tract.
Normally, the first place a melanoma tumor metastasizes to is the lymph nodes, by literally draining melanoma cells into the lymphatic fluid, which carries the melanoma cells through the lymphatic channels to the nearest lymph node basin.
Melanoma, the most dangerous type of skin cancer, may appear as: A change in an existing mole. A small, dark, multicolored spot with irregular borders -- either elevated or flat -- that may bleed and form a scab. A cluster of shiny, firm, dark bumps.