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| 1) |
squamous
cell carcinoma: occurs in the
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keratinocytes
of the intermediate or transitional
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layers
of the epidermis.
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Normally
these cells undergo apoptosis, which results in
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the
protective layer of flattened, dead cells found in
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the
outer cornified layer.
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Acceleration
of apoptosis is an important response of
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these
cells to sun exposure. If apoptosis fails then
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these
cells can become abnormal and produce
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cancer.
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