Nutrition

What Is Skin Cancer? What Is Melanoma?

Melanoma is a malignant tumor of melanocytes. The tumors are generally found in the skin, but may also appear in the bowel and the eye (uveal melanoma). Melanoma is a type of skin cancer - one of the rarer types - but the cause of most skin cancer related deaths. Malignant melanoma is caused by an uncontrolled growth of skin pigment cells (melancytes). The word "melanoma" comes from the Ancient Greek melas meaning "black", and the Ancient Greek oma meaning "disease, morbidity". What is the difference between skin cancer and melanoma? Melanoma is a type of skin cancer. Imagine the words bananas and fruit. All bananas (malignant melanoma)s are fruits (skin cancers), but not all fruits (skin cancers) are bananas (malignant melanomas). There are three main types of skin cancers: *Basal Cell Carcinoma - Sometimes called non-melanoma skin cancer. It usually appears as a small, fleshy bump or nodule on the patient"s hands, neck or head. Sometimes, the nodules may appear on the trunk of the body (mostly as flat growths). 90% of skin cancers are this type in the USA and UK. Basal cell carcinoma is easy to diagnose and is mostly easy to treat successfully. If left untreated it can spread to other parts of the body and can extend below the skin to the bone, causing significant local damage. People with basal cell carcinoma are at higher risk of developing other skin cancers. Melanoma / Skin Cancer News The latest Melanoma News & Skin Cancer News articles published daily. Includes news on the three types of skin cancer - malignant melanoma (a tumor of melanocytes) and non-melanoma (basal cell and squamous cell carcinoma). See our Melanoma / Skin Cancer News Section. Basal Cell Carcinoma is most commonly found among Caucasians. It very rarely occurs among dark-skinned patients. Among Caucasians, people with light hair, light colored eyes, and fair complexions are much more likely to get it, compared to Caucasions with darker colored eyes, hair and complexions. *Squamous Cell Carcinoma -Sometimes referred to as non-melanoma carcinoma, it often appears as nodules on the skin. It is usually found on the rim of the ear, face, mouth and lips, but can also spread elsewhere in the body. It can also appear as red, scaly patches. It is generally found in the skin of Caucasian people, especially those with very fair skin. It is more aggressive than Basal Cell Carcinoma, but is still fairly easy to treat successfully. *Malignant Melanoma - Cancer cells are found in the melanocytes - the pigment cells of the skin, also known as melanin. Although it is extremely rare in teenagers and children, there have been cases. It is predominately found in adults. This is the most aggressive form of skin cancer. Fortunately, it is also the rarest. 75% of all skin cancer deaths are from malignant melanoma. It is most commonly found among fair-skinned people. However, people of all skin types can get it. Melanoma is not commonly found in parts of the body that are not covered by skin, such as the eyes, internal organs, vagina, large intestine, or mouth. A study found that a superfamily of molecules holds the secret to the development and spread of melanoma. Other articles about skin conditions/diseases What is psoriasis? What causes psoriasis? What are skin tags? What causes skin tags? What are pimples? How to get rid of pimples What are blackheads? How to get rid of blackheads What Are Hives? What Is Urticaria? What Causes Hives? What are warts? What causes warts? What are genital warts? What causes genital warts? What is dandruff? What causes dandruff? What is acne? What causes acne? What is nail fungal infection? What causes nail fungal infection? The rest of this article focuses on Malignant melanoma. What are the symptoms of Malignant melanoma? Malignant melanoma exists in a deeper layer of skin compared to other skins cancers. Experts say this is one of the reasons it is the most serious type of skin cancer. The deeper it starts from, the higher are the chances of it spreading. Patients mainly have melanomas on the back of the legs, arms and face. However, it can affect other locations too. The first signs of a melanoma could be: *A new mole appears. *An existing mole changes in appearance from its usual single color and round/oval shape, not larger than Вш of an inch (6mm) in diameter. *Melanomas look like moles with an irregular shape. They tend to have more than just one color. They are generally larger than Вш of an inch (6mm) in diameter. *With some patients the melanoma may itch, and even bleed. There is an ABCDE checklist for finding out whether a mole is more likely to be normal or a melanoma: *Asymmetrical - the mole is not symmetrical, one half is different in shape from the other. *Border - the border is ragged or notched. Most normal moles have regular borders. *Colors - while most normal moles have just one color, melanomas often have two or more. *Diameter - the diameter of a melanoma is greater than most moles (1/4 inch or 6mm) *Elevation - when touched the melanoma will feel slightly raised above the skin Some people refer to Enlarging when talking about the last letter E. A study revealed that dermatologists depend on overall pattern recognition and comparison rather than specific analytic criteria to distinguish melanoma lesions (malignant skin cancer) from harmless skin moles. What causes malignant melanoma? When the structure of DNA in human cells change cancer can begin - we call this genetic mutation. Each of our cells is programmed to carry out many functions; this programming (set of instructions) is in the DNA. The instructions can be to grow, reproduce, auto-destruct, etc. When the DNA alters and instructions change, sometimes cells start to reproduce at an uncontrollable speed - lumps start to appear; these lumps are tumors. If the tumor is left untreated it can grow rapidly and spread to other parts of the body. When cancer does spread, it usually does so through the lymphatic system. The lymphatic system includes several glands around the body. As soon as the cancer reaches the lymphatic system it has access to several other parts of the body. Experts say that over-exposure to sunlight is the main cause of malignant melanomas. Sunlight has large amounts of radiation in the form of light and heat. The atmosphere of this planet filters out most of the harmful effect of this radiation. Two radiation wavelengths, however, still get through and hit our skin - UVA (ultraviolet A) and UVB (ultraviolet B). UVA is the one that causes mutations in our melanocytes. Melanocytes produce melanin; a substance that gives color to our skin. If the mutated melanocytes become mutated (their DNA alters) melanomas can develop. UVB can also cause other non-melanoma types of skin cancer. Artificial sunlamps - those found in tanning beds - also produce UVA. If they are used excessively they can increase a person"s risk of developing melanomas. Who is at high risk of developing malignant melanoma? The following people have a higher risk of developing malignant melanoma: *Those with a history of blistering sunburns as a teenager. *Those who had outdoor summer jobs for three or more years as a teenager. *People with pale skin, especially skin that does not tan easily (goes red instead). *People with red hair. *People with blond hair. *People with light eyes (blue). *People with many moles. *People with many freckles. *A genetic variation leads to a nearly four-fold increase of melanoma in women under the age of 50, researchers have revealed. *People with HIV or any condition that lowers their immune system. *People taking immunosuppressants (medicines to lower your immune system). *People who have a family history of melanoma. Researchers found that people with a family history of the skin cancer melanoma show reductions in anxiety and depression after getting tested for a high-risk gene mutation. Researchers estimate that nearly one-third of cases of melanoma are diagnosed in women during their childbearing years. A study revealed that mobile phone (cell phone) use is not associated with the risk of melanoma of the eye. How is malignant melanoma diagnosed? Anybody who detects a mole that looks different from before should see their GP (general practitioner, primary care physician) immediately. The doctor will look at the patient"s skin and determine whether further assessment is required. In the UK it is common for a GP to take a digital photograph of an unusual-looking mole and to email it to a skin specialist (dermatologist). If the doctor suspects there may be something unusual he will usually refer the patient to a dermatologist. The dermatologist will most likely perform a biopsy - the mole is removed and examined under a microscope to find out whether it has cancerous cells in it. If the biopsy indicates there are cancerous cells, the doctor may carry out further biopsies on the lymph nodes nearest to where the mole was. If the doctor wants to find out whether the cancer might have spread into other parts of the body, he/she may carry out: *Blood tests *A chest X-ray *An MRI (magnetic resonance imaging) scan *A CT (computerized tomography) scan A team of researchers from the University of California, San Francisco, has developed a technique to distinguish benign moles from malignant melanomas by measuring differences in levels of genetic markers. What are the stages of malignant melanoma? Most dermatologists refer to 4 stages of melanoma: *Stage 1 - The melanoma is just on the surface of the skin. It is less than 2mm thick (less than 1/10th of an inch). *Stage 2 - The melanoma is still just on the surface of the skin. However, it is over 2mm thick. There may be other small pockets of cancerous cells near the main melanoma. *Stage 3 - The melanoma has reached nearby lymph nodes. Cancerous cells are present which are further away than 5cm (2 inches) from the main

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