Skin cancer

**Skin cancers** be cancers wey dey arise from de skin. Dem be secof de development of abnormal cells wey get de ability to invade anaa spread to oda parts of de body. E dey occur wen skin cells grow uncontrollably, dey form malignant tumors. De primary cause of skin cancer be prolonged exposure to ultraviolet (UV) radiation from de sun anaa tanning devices. Skin cancer be de most commonly diagnosed form of cancer insyd humans. Der be three main types of skin cancers: basal-cell skin cancer (BCC), squamous-cell skin cancer (SCC) den melanoma. De first two, along plus a number of less common skin cancers, be known as nonmelanoma skin cancer (NMSC). Basal-cell cancer dey grow slowly wey fi damage de tissue around am buh e be unlikely to spread to distant areas anaa result in death. E often dey appear as a painless raised area of skin wey fi be shiny plus small blood vessels wey dey run over am anaa fi present as a raised area plus an ulcer. Squamous-cell skin cancer be more likely to spread. E dey usually present as a hard lump plus a scaly top buh sanso fi form an ulcer. Melanomas be de most aggressive. Signs dey include a mole wey na e change in size, shape, color, e get irregular edges, e get more dan one color, be itchy anaa dey bleed.

More dan 90% of cases be caused by exposure to ultraviolet radiation from de Sun. Dis exposure dey increase de risk of all three main types of skin cancer. Na such exposure increase since de beginning of de industrial revolution, partly secof ozone depletion. Tanning beds be anoda common source of ultraviolet radiation. For melanomas den basal-cell cancers, exposure during kiddie time be particularly harmful. For squamous-cell skin cancers, total exposure, irrespective of wen e dey occur, be more important. Between 20% den 30% of melanomas dey develop from moles. People plus lighter skin be at higher risk as be those plus poor immune function such as from medications anaa HIV/AIDS. Diagnosis be by biopsy.

Decreasing exposure to ultraviolet radiation den de use of sunscreen appear to be effective methods of preventing melanoma den squamous-cell skin cancer. E no be clear if sunscreen dey affect de risk of basal-cell cancer. Nonmelanoma skin cancer usually be curable. Treatment be generally by surgical removal buh fi, less commonly, involve radiation therapy anaa topical medications such as fluorouracil. Treatment of melanoma fi involve sam combination of surgery, chemotherapy, radiation therapy den targeted therapy. Insyd those people wey na dema disease spread to oda areas of de body, palliative care fi be used to improve quality of life. Melanoma get one of de higher survival rates among cancers, plus over 86% of people insyd de UK den more dan 90% insyd de United States dey survive more dan 5 years.

Skin cancer be de most common form of cancer, globally dey account for at least 40% of cancer cases. De most common type be nonmelanoma skin cancer, wich dey occur in at least 2–3 million people per year. Dis be a rough estimate; dem no dey keep good statistics. Of nonmelanoma skin cancers, about 80% be basal-cell cancers den 20% squamous-cell skin cancers. Basal-cell den squamous-cell skin cancers rarely dey result in death. Insyd de United States, na der be de cause of less dan 0.1% of all cancer deaths. Globally insyd 2012, na melanoma occur insyd 232,000 people wey e result in 55,000 deaths. White people insyd Australia, New Zealand den South Africa get de highest rates of melanoma insyd de world. Na de three main types of skin cancer cam be more common since late 20th century, especially insyd regions wer de population be predominantly white.

## References


## External links

* Skin cancer procedures: text, images and videos