and Muoio, Deborah M
4.10 Selenium Selenium homeostasis is mainly regulated by renal clearance, with excessive selenium excreted as methylated metabolites
They are however described, at birth, the nevi already present then congenital, and what is most interesting in this case - often associated with a proliferation pilifera around the nevus - is the size of these congenital snows: they can reach up to 20cm, to occupy an entire area of the body, we talk about small congenital snows, medium, giant when they exceed 15-20cm in diameter, in this case this nevus which is a trivial nevus, a nevus composed with also an intradermal component, the only evolution malignant described is really responsible for these giant congenital nevi [to verify if the transformation can occur only in the giant congenital nevus], ie there would be a direct relationship between the possibility of the onset of a melanoma, this usually due to the fact that there is a greater quantity of melanocytes, and therefore the possibility that on different outbreaks may at some point establish a melanoma is directly proportional to the fact that being a nev congenito giant, if for example it was also in the photoexposed regions of course then undergoes' alteration, the actinic damage as we will see in melanoma, and in phototypes of a certain type, those with fair skin in particular, increases the risk of occurrence of a melanoma even if they are substantially rare events
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