The sarcoma group of skin diseases is of exceeding interest to the dermatologist on account of the frequency in which the skin is involved even where the tumors are primary in some other organ, and also from the fact that the type best known to dermatologists, the idiopathic hemorrhagic sarcoma of Kaposi, seems to be independent of any primary growth and apparently originates from the vascular tissue of the extremities. Perhaps the one which carries the greatest interest of all, and certainly the one which has given rise to the most active controversy regarding its nature, is the so-called melanoma—a name which does not commit one to any positive view regarding its genesis. Although it sometimes originates from pigmented moles and even those which are non-pigmented, it also occurs independently of any visible change in the skin, so that perhaps the importance of these pigmented moles as potential
FORDYCE JA. MELANOMAS AND SOME TYPES OF SARCOMA OF THE SKIN. JAMA. 1910;LIV(2):91–97. doi:10.1001/jama.1910.92550280001001
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