Eyelid Cancer Have Risen Steadily Over Past 15 Years

The eyelid region is one of the most common sites for non-melanoma skin cancers. New cases of a particular type of eyelid cancer (squamous cell carcinoma) have risen steadily over the past 15 years in England, reveals research.

The study got published online in the British Journal of Ophthalmology. There has been an annual increase of 2 percent during this period, with an approximate doubling in risk for each decade above the age of 60, the findings show.

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‘New cases of a particular type of eyelid cancer (squamous cell carcinoma) have risen steadily over the past 15 years in England.’

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At least a quarter of all cases of cancer originate in skin cells, with squamous cell cancer (SCC) the second most common skin malignancy.

Although not considered a high risk cancer, because it is rarely invasive and tends not to spread, it behaves differently in the head and neck regions, say the researchers.

And eyelid SCC has a particularly high risk of causing disfigurement, functional problems, and occasionally death if it spreads to the brain, eyeball, or other tissues in the face.

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To find out trends in the UK, the researchers mined data submitted to one of the UK National Cancer Registration and Analysis Services, which record new cases of cancer in each of the four UK countries.

They looked at new cases of SCC of the eyelid, diagnosed only in England between 2000 and 2014. These totalled 4022 during this period.

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The rate of increase rose by 4 percent each year between 2000 and 2014, a trend that is partly explained by population increases, particularly the proportion of elderly people, say the researchers: older age emerged as a key risk factor in the data, and the diagnosis rate more or less doubled for every decade beyond the age of 60 in both men and women.

But even after factoring in these trends, the rate of SCC eyelid cancers still increased by an annual 2 percent--equivalent to 0.0137 extra cases per 100,000 of the population/year. And this cannot be explained simply by a rising proportion of elderly people in the population, say the researchers.

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The figures also showed that while people living in areas of deprivation were no more likely to be diagnosed than those in the most affluent areas, and that men were almost twice as likely as women to be diagnosed with SCC.

"The reason for the strong association between eyelid SCC and age is likely to be due to cumulative exposure to environmental risk factors including UV radiation and iatrogenic [medically induced] causes, such as the use of systemic immunosuppression to treat autoimmune disease and prevent rejection of solid organ transplants," suggest the researchers.

But the reasons behind the gender differences in rates are less clear, they say. It may be behavioural, with men more likely to be exposed to sunlight, or it might even be that the female hormone oestrogen is protective, as has been suggested by other researchers.

Source-Eurekalert