The activation of FGFR3 might be a common feature in the tumorigenesis in seborrhoeic keratosis, although the activation does not induce a typical oncogenic signal in keratinocytes. In addition, OIS due to some oncogenic signals rather than activation of FGFR3 might be involved in the early skin carcinogenesis related to chronic ultraviolet radiation exposure.
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Hida et al. (2009) studied this question.
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