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Skin Cancer : causes and symptoms.

Skin cancer is the most common form of human cancer. It is estimated that over 1 million new cases occur annually. The annual rates of all forms of skin cancer are increasing each year, representing a growing public concern.
Skin cancer is a malignant growth on the skin which can have many causes. This sudden transformation in the cells causing uncontrollable formulation of cells leads to a mass called a tumour. Tumour of skin is often referred to as lesions. These tumours are cancerous in the cases when they are malignant causing invasion of neighboring tissues due to the excessive growth. The tumours may also travel to remote organs through the bloodstream.
The three most common skin cancers are :
– Basal cell cancer
– Squamous cell cancer
– melanoma, each of which is named after the type of skin cell from which it arises.

Symptoms of skin cancer :
– These include changes in the skin that do not heal, ulcering in the skin, discolored skin, and changes in existing moles, such as jagged edges to the mole and enlargement of the mole.
– In the case of the basal cell carcinoma generally a raised, smooth, pearly bump on the skin of the head, neck or shoulders is visible sometimes crusting and bleeding in the center of the tumor also develops.
– In the case of Squamous cell carcinoma a thick patch develops red in color. Ulcers and bleeding can also develop.
– The melanomas have brown or black colored lesions. The signs of malignant melanoma include a change in size, shape, color or elevation in the pre-existing mole.

Causes of Skin cancer :
– Smoking tobacco and related products can double the risk of skin cancer.
– Overexposure to UV-radiation.
– Chronic non-healing wounds, especially burns.
– Genetic predisposition.
– Human papilloma virus (HPV) is often associated with squamous cell carcinoma of the genitals, anus, mouth, pharynx, and fingers.
– Skin cancer is one of the potential dangers of ultraviolet germicidal irradiation.
– Deficiencies in certain vitamins and minerals.

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