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Masson Neruonevus
Masson neuronevus is a blue nevus variant which displays neural differentiation in a growth pattern along nerves. Ovoid nests of nevus cells and pigmented dendritic cells are found scattered thick collagen fibers. Also present are thick hylanized vessels. Differentiating this lesion from a melanoma; the cells are monomorphic, with no mitotic activity, and no necrosis is found.
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