5 Types of Cancer rarest in the World

Cancer is a disease characterized by typical cell cycle abnormalities that cause the cell's ability to :

• Uncontolled growth (cell division beyond the normal limits)
• Attacking the nearby biological tissue.
• Migrate to other body tissues through the blood ciculation or the lymphatic system, called metastasis.

Cancer can cause many different symptoms, depending on the location and character of the malignancy, as well as the presence or absence of  metastasis. Diagnosis usually requires the microscopic examination of tissue obtained by biopsy. Once diagnosed, cancer is usually treated with surgery, chemotherapy, or radiation.

However, outside of cancer is already very familiar, there is also a cancer that may never have heard of. A study during the 10 years that examined nine million cancer types mentioned, there are around 60-70 types of cancer is very rare. Here are five of them:

1. Cancer Foot
Skin cancer or melanoma is a type of cancer that is most common foot. Melanoma accounts of leg three to five percent of all cases. Most of the causes are genetic factors or environmental carcinogens such as exposure to sunlight.

2. Vaginal Cancer
Cancer of the vagina is a condition with a level of ferocity in the form of vaginal cancer in the emergence of female sex organs, and does not include section are also on the cervix and vulva, vagina to be located between the vulva until early in the cervix uteri. For vaginal cancer cases to be classified as a form of vaginal carcinoma if the primary location of its growth is part of the vagina.

3. Salivary Gland Cancer
Cancer symptoms are numbness in the area of the face, bumps on the ear, cheek, jaw or mouth area. Salivary gland cancer is different from other cancers that appear around the mouth. Alcohol and tobacco did not appear to increase the risk of this cancer. As well as genetic factors. Salivary gland cancer is more common in men than in women, and often occur in people who work in places that are prone exposure to radioactive substances.

4. Chordoma
Chordoma is a type of bone cancer found in the skull and spine. Chordoma grew out of the remnants of a small cartilage when we were in the womb. Very hard to learn what causes cancer Chordoma, but experts know that it's not genetic. These cancers tend not to respond to chemotherapy, radiation, or drugs. Surgery is usually done to resolve it but the results are not necessarily success, because the tumor grows in the spinal cord and surrounding nerves are vital.

5. Mesenchymal Chondrosarcoma
Cancer cartilage is extremely rare, less than 1,000 cases reported in medical literature since 1959. cartilage cancer is aggressive and rapidly spread to organs and lymph nodes, making it very dangerous if not detected early.

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