Skin Cancer The number of new cases of cancer I

Skin cancers are most readily cured when discovered early and treated promptly. Every year, more than 500,000 new cases of skin cancer are diagnosed, they account for one-third of all new cancers. Fortunately, this is the easiest of all cancers to detect, and most cases can be treated successfully. The sun's ultraviolet rays are the main cause of the two most common forms of skin cancer--basal-cell and squamous-cell carcinomas. Less common but more dangerous is melanoma. Also prevalent is actinic keratosis, a common precancerous skin disorder. Basal-cell carcinomas, the most common of skin cancers, appear on the trunk of the body, starting out as small, distorted cells found in the lowest part of epidermis. Luckily, these slow-growing tumors do not metastasize (spread), but they do ulcerate and ooze fluid if left untreated, and they ultimately damage deep local areas: "These tumors don't spread quickly. It may take many months or years for one to reach a diameter of one half inch. Untreated, the cancer will begin to bleed, crust over, then the cycle will repeat."

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in intensifying the sun's rays. Supposedly, the sun can be 2.5 times as intense at 10,000 feet as at sea level. For every 1,000-foot increase, radiation increases 4 percent to 5 percent. Since the sun is directly overhead from 10 a.m. to 3 p.m., its danger times should be respected. One major controversy is the tanning salon. These clubs have tan-promoting lamps and attract customers by stressing safety. In the early 1980's fitness boom, manufacturers said their lamps emitted only safe UVA rays, not burning UVB rays. Yet, in the early 1980's, there were 2,500 to 5,000 injuries from radiation. Some manufacturers maintain that, although their machines emit 100 times the UVA rays in nature, the long-term effects of these rays are essentially the same as UVB rays. However, according to one report, "UVA rays seem to be much less effective in tanning; thus tanning lamps try to do the job by emitting great quantities of UVA light." In any case, the machines still emit a high level of UVB rays, about 1 percent. And, the report says, "Experts warn that artificial sunlight is also ultraviolet radiation - with all the risks of the real thing, and then some." Whatever the specific cause, sunlight damage is cumulative. Build
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Approximate Word count = 2347
Approximate Pages = 9 (250 words per page)

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