Environmental factors

Excessive exposure to the sun influences the production of these cancers. People who work outdoors, such as farmers and sailors, have a higher incidence. Often occur on exposed skin, often in head and neck.

Although sunlight helps to synthesize vitamins A and D, overexposure, produce or burns, increases the risk of developing skin cancer, including malignant melanoma.

There is a correlation between risk of melanoma and latitude. It also influences the time period during which a person has lived in Ecuador-latitude countries, which means excessive sun exposure maintained for a period of life.

Not only influences but prolonged exposure to direct sunlight exposure, on time, on holiday for example, is a risk factor for melanoma.

Melanomas differ from malignant tumors non-melanoma skin about sex, age and body location. The majority of cutaneous malignant melanomas occur in areas not receiving the accumulated UV dose increased.

Although not known exactly what the most dangerous pattern of sun exposure, some studies support the hypothesis that intense, intermittent exposure to ultraviolet radiation of skin is normally protected is responsible for the formation of melanoma.

Age also appears to influence and burns from the sun before age 15 increases melanoma risk doubles.

Physical Characteristics
The white people of Scottish, English or Irish with blond or red hair, blue eyes and abundant freckles are especially susceptible.

Melanoma is very rare in the population being predominantly black or Oriental, when it occurs, little pigmented areas such as palms and plants and their prognosis is worse.

The sensitivity of skin to sun tanning and the difficulty increases the risk of melanoma.

The skin reaction to sunlight is associated with factors such as skin pigmentation, the number of freckles in childhood or adulthood and the number of nevi (moles-like formations, which are benign melanocytic tumors), accounting for all factors risk for cutaneous malignant melanoma.

The highest incidence of nevi in Caucasians leads to the notion that ultraviolet radiation plays an important role in the development of nevi. It has been proven the existence of an increased number of nevi in areas of sun-exposed skin than in protected areas, associating its increase with a greater propensity to burn than tan, the number of sunburns, the tendency to freckles and style of life associated with increased sun exposure.

A person with sensitive skin to the sun, more than 150 melanocytic nevi and dysplastic nevi any (with similar microscopic appearance of malignant melanoma cells), might have 50 times the risk of melanoma than someone without these characteristics.

Genetic factors
The nevoid basal cell epithelioma syndrome is an inherited disorder in which patients develop numerous basal cell carcinoma from the second decade of life and that ultimately affect any area of the skin.

Xeroderma pigmentosum is an inherited disorder that is caused by an alteration in DNA repair, is also associated with the occurrence of multiple cutaneous carcinomas.

In cutaneous malignant melanoma has been described a familial predisposition. The estimated risk is 70% present in patients with neurocutaneous melanosis and different types of xeroderma pigmentosum, from 1% in children of patients with non-familial melanoma alone and 6% in families with dysplastic nevus syndrome and history of two or more malignant melanomas.

Immunosuppression
Those who have been dealt with drugs that suppress their immune systems, are more likely to develop melanoma.

Overexposure to lamps and booths
Tanning lamps and booths are a source of ultraviolet radiation. Excessive exposure increases the risk of developing skin cancer.

Age
About half the number of cases of melanoma occur in people over 50 years.

Other factors
Exposure to carcinogens, trauma or scarring, radiation injuries and chronic viral infections are among the factors predisposing to skin cancer.

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Skin cancer is a disease caused by the development of cancer cells in any of the layers of the skin.

There are two types: nonmelanoma and melanoma.

The non-melanoma cancer is the most common and is called nonmelanoma because they formed from other skin cells are not accumulating pigment (melanocytes).

Within this type are all skin cancers less malignant melanoma is less common and more malignant, and which is explained later.

Skin cancer is more common in white skinned people and have spent much time exposed to sunlight, especially when sun exposure occurred in childhood and there were numerous sunburn.

Although it may appear anywhere on the skin, is more common than is presented on the face, neck, hands and arms. This cancer is one of the most common of all cancers, and an estimated two million are diagnosed new cases per year worldwide.

In recent years, the incidence of malignant melanoma has increased dramatically, it has been multiplied by 3.3 in men and 2.5 in women, in the last twenty years in Spain. Although this represents less than 3% of all tumors and early detection campaigns have helped reduce the mortality by 30% since the seventies.

Is recognizable by a change in the appearance of the skin, like a wound that does not heal or a small lump. You may also see a red, rough or scaly skin with a tendency to grow.

To any change or abnormality of the skin, is to visit the doctor. This can take a sample and analyze it (biopsy) to check whether a tumor is malignant or not.

The Papanicolaou (Pap) is the diagnostic test for cervical cancer. HIV-positive women should have a Pap smear every six months for a year, if the results of these tests are normal, repeat once a year. The Pap smear can detect dysplasia.

When dysplasia is found, it is necessary to make another examination with a magnifying instrument called a colposcope. The colposcope can see the abnormal tissue so that it can perform a biopsy.

Most times it is only dysplasia but sometimes it may be cancer. After an examination with a colposcope, you may feel some discomfort and some bleeding.

When cervical cancer is detected, further testing is needed before starting to plan treatment. This process is called staging the cancer (classification of the extent and severity of the disease). Staging is a series of tests and assessments that indicate how advanced the cancer.

How is cervical cancer?

A very small cancer (called microinvasive cancer), can be completely removed through a procedure called a cone biopsy.

This type of biopsy removes a larger amount of the cervix and the tissue is examined carefully under a microscope to see if all cancer cells have been removed. This procedure can be done in a doctor’s office or hospital. Because there are three types of cone biopsy, side effects and recovery time can vary.

If the cancer can not be completely removed by cone biopsy, a woman may need to have a hysterectomy (surgical removal of uterus) to prevent cancer to invade other parts of the body. Sometimes, the lymph nodes in the pelvic area are also removed. This operation is called a radical hysterectomy. But if the cancer has spread to other parts outside the cervix, the common treatment is radiation. Generally, chemotherapy is not used to treat cervical cancer.

Can cervical cancer be prevented?

YES! Cervical cancer can be prevented by regular screening and appropriate treatment for dysplasia. It is therefore very important that women become HIV-positive Pap test regularly. HIV-positive women who have a medical history of dysplasia should probably be tested every six months with a colposcope. Be sure to see a health professional who has experience with HIV.

Human Papilloma Virus (HPV)

HPV does not always cause cancer. In fact, probably one third of sexually active women are exposed to HPV, but very few will develop cervical cancer.

HPV is also known as the virus that causes warts. However, some types of HPV do not produce any symptoms. Recent studies have determined that there are at least 60 different types of HPV. At least twelve types of HPV are sexually transmitted. Some are transmitted very easily through all types of close contact, sexual or skin to skin.

It is often necessary to repeat the treatment for HPV (usually one to three times per week for a period of two to six months). Not recommended for sex when genital warts are present. His partner (a) sexual should also be tested for HPV.

Cervical cancer is a malignant growth that occurs in the cervix. It connects the uterus with the vaginal canal. You can touch it with their fingers inside the vagina.

It is believed that cervical cancer is caused by a sexually transmitted virus called human papillomavirus (HPV). Only certain types of HPV can cause cancer.

Usually, this virus causes cancer in the cervix, but HPV can also be responsible for cancer in the vagina, vulva, and ano-rectal area (in men or women) and on the penis.

It’s called “dysplasia” to the appearance of abnormal cells in the cervix. When dysplasia is diagnosed and treated early, it can prevent cancer. Cervical cancer begins in some cells, but gradually grows in size. This growth usually occurs over a period of ten years or more.

When this growth can be seen and felt in a pelvic exam, called a tumor. If the tumor is not treated, can spread to other areas such as the ovaries, fallopian tubes and vagina. If cervical cancer is not treated can become a lethal condition.
Who is at risk of developing cervical cancer?

In 1993, the Center for Disease Control (CDC) added invasive cervical cancer to the list of diseases caused by AIDS. This decision was based on the observation that HIV positive women are more prone to develop dysplasia than women without the virus.

Many doctors believe that dysplasia can become cancer more quickly if there is also infected with HIV. High-grade dysplasia appears to occur more frequently in women with CD4 cell counts (T cells) below 400. Other risk factors that may be associated with cervical cancer and can be corrected are: cigarette smoking and poor diet (perhaps due to lack of vitamin A).

What are the symptoms of cervical cancer?

A woman may have cervical cancer without any symptoms. Women with cervical cancer may become pregnant and have normal menstrual periods. There are no specific signs or symptoms, especially in the early stage of cancer. In advanced stages, women may have pain, vaginal discharge fluid and may bleed between periods normal.

Testicular cancer, for example, tends to affect men more than young adults. Read on to learn more about the types of cancer that can affect adolescents.

Cancers that occur in adolescence, have one thing in common: cells, the basic components of the human body. Cancer occurs when cells develop abnormally and grow uncontrollably.

This article contains information about the types of cancer that teens may face, including warning signs and symptoms and possible treatments for these cancers.

While not common, other cancers that may be suffered by adolescents are testicular cancer and rhabdomyosarcomas.

Although testicular cancer is rare in adolescence, is the most common cancer in men aged 15-35 years. If detected and treated early, testicular cancer is almost always curable.

The boys must learn to examine their testicles regularly to detect any abnormal lump because it is often the first sign of testicular cancer.

Rhabdomyosarcoma, or soft tissue sarcomas are less common cancers that mostly occur in infants, children and adolescents. In these types of cancer, cancer cells grow in the soft tissues of the skeletal muscles (the muscles of the body we use to control movement).

Although these cancers can occur anywhere in the body, rhabdomyosarcomas most frequently occur in the muscles of the trunk, arms or legs. The types of treatment used and chances for recovery depend on the location of rhabdomyosarcoma and whether the cancer has spread to other parts of the body.

The role of the lymphatic system is to fight the germs that cause infection and disease. Most adolescents with lymphoma have Hodgkin’s disease (cancer of the lymph tissue) or non-Hodgkin lymphoma (cancer of immune system cells that circulate in our bodies).

Hodgkin’s disease usually occurs in adolescents and young adults. May arise in lymph nodes in the neck, armpits, chest or other parts of the body. Lymph nodes were enlarged but are usually not painful.

Hodgkin’s disease is characterized by the presence of large abnormal cells, called Reed Sternberg cells are detected with a microscope after a biopsy (a procedure in which a doctor takes a small tissue sample for the presence of cells cancer). Chemotherapy and often radiation are used to treat Hodgkin’s disease.

The non-Hodgkin lymphoma is similar to leukemia (ALL) because both are characterized by the presence of malignant lymphocytes (white blood cells in the lymph nodes) and because they share many symptoms. Non-Hodgkin lymphoma treated with chemotherapy.

Most adolescents with Hodgkin’s disease or non-Hodgkin lymphoma and complete treatment a complete remission with no signs of the disease.

Most brain tumors in adolescents are primary. Two of the most common forms are astrocytomas and ependymomas. Astrocytomas are brain tumors that originate in the brain cells called astrocytes.

This type of tumor does not usually spread outside the brain and spinal cord, and usually does not affect other organs. Ependymomas are tumors that usually begin in the lining of the ventricles of the brain.

The brain has four ventricles, or cavities, that are a pathway for cerebrospinal fluid, a liquid substance that protects the brain and spinal cord, and absorbs shock.

No one knows exactly what causes primary brain cancer. One possibility is that a problem occurred with the cells into the brain and spinal cord.

Treatments vary depending on the type of tumor and its location. If possible remove a tumor, surgery is usually performed, followed by radiation. Some patients also receive chemotherapy.

The odds of surviving a brain tumor depend on the type, location and treatment. But if it is possible to remove the tumor and additional treatment, it is likely to cure cancer.

Because these abnormal blood cells are defective, they do not help protect the body against infections, as do normal white blood cells.

And because they grow uncontrollably, they take over the bone marrow and interfere with the production of other types of cells important to blood flow, as red blood cells (which carry oxygen) and platelets (which help blood clot) .

Leukemia causes problems like bleeding, anemia (low red blood cell count), bone pain and infections. You can also spread to other parts of the body such as lymph nodes, liver, spleen, brain and in the case of men, the testicles.

The most common types of leukemia in teens are acute lymphocytic leukemia (ALL) and acute myeloid leukemia (AML).

Virtually all persons with ALL and AML are treated with chemotherapy and some also receive stem cell transplants. During this procedure, given new stem cells from another person.

Bone marrow transplants are a common form of stem cell transplantation. Some people also receive radiation. The duration of treatment and types of medicine given will vary depending on the type of leukemia.

The chances of cure of certain types of leukemia are very good. With proper treatment, most patients with ALL and many patients with AML are cured of the disease and it does not reappear.

Treatment for osteosarcoma usually involves chemotherapy (medication intravenously, or IV, which destroys cancer cells) as well as surgery to remove the tumor. In a few cases in which these procedures fail to fully overcome the cancer, the doctor may need to amputate a part or all of the limb to fight cancer.

Doctors can also perform surgery for limb salvage. In this intervention, the bone is removed to prevent cancer and the amputation of the limb by filling the space with a bone graft or a metal rod special.

The loss of a limb can be devastating, especially for teens who are going through other bodily changes. The psychological and physical therapy (also called “physical rehabilitation) can be very useful in this situation.

In general, adolescents who are receiving must practice amputation prosthesis or artificial limb, to help them adapt. Most adolescents are able to return to normal activities, including sports.

Most people develop side effects such as hair loss, bleeding, infection and heart or skin problems, from medicines used in chemotherapy treatment for osteosarcoma. Chemotherapy may also increase a patient’s risk of developing other cancers in the future. The good news is that most teens with osteosarcoma do recover.

Ewing Sarcoma

Another type of cancer that affects the bone is Ewing’s sarcoma. It is similar to osteosarcoma in that it also affects adolescents and young adults, and usually in the leg or pelvis.

Most teens with Ewing’s sarcoma receiving chemotherapy and undergoing surgery. Some patients also need radiation in addition to surgery or in lieu thereof, to be sure to destroy the remaining cells. Ewing’s sarcoma generally responds well to chemotherapy and radiation.

Osteosarcoma and Ewing’s sarcoma share common risk factors and the same side effects of treatment. Chances for recovery depend on the location of the tumor, its size and whether it has spread. But both types of bone cancer respond well to treatment and, in many cases are curable.

Osteosarcoma affects twice as many boys than girls and often occurs in people with higher than average.

Some medical problems may be due to genes, such as retinoblastoma, a tumor that develops in the retina, may predispose some adolescents to develop osteosarcoma. The same happens if a teenager has received radiation treatments for other bone cancers.

The most common symptoms of osteosarcoma are pain and swelling of the legs or arms, sometimes accompanied by the appearance of a package. Some people suffer more pain at night or when exercising.

Often, osteosarcoma is found in the bones around the knee, but can also occur in other bones.

In exceptional cases, a tumor can spread or metastasis outside the bone, nerves and blood vessels of the limb. (The word metastatic disease is the term doctors use when cells from a tumor break away from the original cancer site and move to different tissues or organs).