Melanocytic Lesions: Nevi and Dysplastic Nevi
Q: Which skin lesion is a benign proliferation of melanocytes commonly known as a mole?
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True. Long before the discovery of viruses, some physicians and scientists speculated that cancer might be caused by a transmissible, living agent—a 'parasite' or 'contagium.' While the 'Contagion Theory' (that cancer itself was contagious between people) was wrong, this line of thinking presciently pointed towards infectious causes. It laid conceptual groundwork for the later discoveries of true oncogenic pathogens like Helicobacter pylori (bacteria) and various tumor viruses (e.g., HPV, EBV, HBV).
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