How to Avoid Skin Cancer
|One skin response to excess sun, actinic keratosis, is an indicator of trouble to come, so we shall discuss it briefly before going on to list the practical steps to avoid skin cancer, as provided by CancerTreatmentMexico.com,
Actinic keratosis (sometimes called solar keratosis) documents the total exposure to solar radiation over the years. Thus, the number and size of these lesions give some indication of the risk for the non-melanoma types of skin cancer – BCC and SCC.
Actinic keratosis lesions are irregular, ill-defined, pale-brown or flesh-coloured patches; sometimes they are scaly, or quite dark in colour. Less than one in 1,000 will convert into SCC within a year. Although this risk seems small, remember that there may be dozens of such foci on one person. Therefore, once they’ve been diagnosed, they should be removed.
The best way to remove actinic keratosis is using intense freezing (cryotherapy) with a single application of liquid nitrogen. This is a pretty painless procedure, and very effective. Occasionally, surgical removal is used for large lesions. Chemical destruction (with a drug called 5-fluorouracil) is an alternative if there are many lesions involving the head and neck; application is twice daily for 2 to 5 weeks, and there may be a risk of infection and inflammation. More cosmetic approaches include chemical peeling and facial dermabrasion.
Actinic keratosis lesions may pass unnoticed or be dismissed as ‘age-spots’. If they start changing into a SCC, there may be pain, redness, ulceration, hardening, deeper colour, and increasing size. Most SCCs occur at a site of previous actinic keratosis.
Actinic keratosis is also a forerunner of BCC, but it’s now known that severe sunburns in childhood and adolescence may also be responsible for some cases of BCC. In the case of melanoma, episodes of childhood sunburn are more significant as the probable risk factor than the accumulated total ‘dose’ of sun exposure.
What’s to be done?
It’s known that 80% of lifetime sun exposure is acquired before age 18. This makes taking sensible precautions in childhood and adolescence the prime preventive measure.
1. Avoid exposure to sunlight when the sun is strongest, that is between 10 am and 4 pm.
Early diagnosis improves the likelihood of a successful cure enormously. And the greatest delay in diagnosis has been shown to be due to late presentation of patients to their physicians, rather than misdiagnosis. So increased awareness of the possibility of skin lesions is paramount.
There is some disagreement among experts as to the right frequency for full-body examination by a physician. A good compromise is for everyone to examine themselves all over once a month, with an annual inspection by a physician after the age of 40. (Of course, if there are potential risk factors, such as a family history, examinations should start earlier and be more frequent). Annual examinations offer an opportunity for the dermatologist to remove any actinic keratosis lesions.
People with moles should know what to look for — they can use the ABCDE rule:
• A symmetry — when both sides of a mole don’t look the same
Other changes that people should watch for:
Some other risk factors
There are some risk factors that cannot be influenced by lifestyle changes. Increasing age is a risk factor for BCC and SCC, but less so for melanoma, which is generally seen in early adulthood. A family history plays a role in the occurrence of melanoma, but not in BCC and SCC. Men are slightly more likely to get skin cancer — of any type – than women.
Some chemicals can increase the risk for BCC and SCC: coal-tar products, tobacco, and psoriasis therapies (e.g. PUVA therapy). Radiation may increase the risk of melanoma. Finally, certain illnesses can increase the risk of BCC and SCC – chronic skin infections, human papillomavirus, and immunosuppression for any cause.