The color of the skin and the time it takes to show skin redness after sun exposure without protection are risk factors for malignant melanoma in a Mediterranean population. Assessment of both elements with the right tools help to better identify individuals most likely to get skin cancer, so they could play an important role in the prevention, according to a study by a team of scientists from the Department of Dermatology University of Florence, Italy.
This research has evaluated both instrumentally elements, using specific technologies, to correlate with the risk of malignant melanoma. First we measured the color of the skin through a cromaméter, allowing studies to obtain data on skin and spots, rashes and skin color.
On the other hand, the team also analyzed the sensitivity to ultraviolet type B of each of the 143 patients with melanoma and 102 without the disease who participated in this study.
To assess this sensitivity we used the minimal erythema dose (MED), ie the time it takes to appear the first skin redness after sun exposure in unprotected skin, which varies depending on skin type. To calculate this dose, the team of scientists used a set of four fluorescent lamps generating ultraviolet B for broadband in areas not tanned and unprotected (eg, buttocks). After 24 hours of radiation, early erythema were evaluated with a colorimeter, a tool that identifies the color and hue for a more objective measure of color.
Also recorded in each participant, the number of moles larger than two millimeters and of those atypical, either for asymmetry, irregular borders and uneven pigmentation.
After measuring the color of the skin and the minimum dose necessary to present the first erythema in both groups, there was a clear correlation between increased melanoma risk and phenotypic variables such as eye color, a low phototype (light), skin color, large numbers of moles and the presence of atypical nevi. “The lower the minimal erythema dose (solar exposure time required to display skin redness), the more likely to present sunburn and skin type that is proportional to (visual classification of skin types.
The results of this study, this association is related to the increase of malignant melanoma, even to present twice as likely to develop melanoma more vulnerable individuals.
The solar light sensitivity of each person, therefore, can be used, along with individual characteristics such as skin color and eye or the number of moles as a key element to quantify the individual risk of melanoma.
“In this sense, the practice MED would be important to increase preventive measures,” the dermatologist. “In the molecular and pathogenic learn more about this factor would also help to better understand the evolution of melanomas and other skin cancers,” added the charge of the investigation.
The sun has a great importance for human health. Depending on the characteristics of the person and the time of exposure to their radiation will occur on the body has an impact that can be positive or negative.
On the positive side highlights the role of the sun in the prevention of certain vitamin deficiencies (lack or decline of vitamins). Specifically, solar radiation favor the production of vitamin D, needed to metabolize calcium and prevent rickets (a disease characterized by the deformation of the bones, which mainly affects children).
On the negative side, skin, inadequate sun exposure causes disruption that may occur in the short or long term, among which are:
* Sunburn characterized by erythema intensity (redness), swelling, and even the formation of vesicles or blisters.
* Tan, produced by the action of solar radiation on the melanin (pigment that gives skin its color). Sun exposure
* Hyperkeratosis, or thickening of the skin.
* Photo-aging, or aging of the skin by the action of the sun. It is characterized by rough skin without elasticity, wrinkles thick lines (grooves), spots and even small spills capillaries (blood vessels that run extremely thin skin). It is estimated that 75% of wrinkles are caused by sun exposure.
* Changes in pigmentation, especially hyperchromias type (increased pigmentation), among which are the freckles (common in people redheads), moles (also known as nevi) and melasma (dark patches of poorly defined borders , frequently occurring during pregnancy).
* Skin cancer, associated with sun exposure in 90% of cases. Today it is known that the number, frequency and intensity of sun exposure during childhood and adolescence, is proportional to the risk of skin cancer.
Preventing Skin Cancer Protective Suits Using Solar Radiation
The skin cancer is one of the most common types of cancers in the world, This is mainly due to increased solar radiation due to the increase of the hole in the ozone layer. The company is attractive to people who look tanned, but I do not know is that these people who look so tanned are at high risk of skin cancer. The tan on the skin is produced by the death of the cells found in the facial tissue of the face. Prolonged exposure to sunlight can cause the DNA mutations leading to suffer the dreaded skin cancer. Some research has predicted that with increasing the hole diameter on the incidence of skin cancer in the world population increased mightily.
The dangers of solar radiation on our skin does not mean we should hide the sun forever, there are several methods that can be used to prevent harmful effects of solar radiation. Remember to apply sunscreen with at least a factor of 30 in all areas of skin not covered by clothing. Remind your children to stay away from solar radiation between 10 am and 2 pm to reduce their exposure to UVR