Abundant mucin deposition is an unusual finding in melanocytic naevi. We describe the first example, to our knowledge, of a sclerosing blue naevus with an abundant mucinous stroma in two unrelated patients. This uncommon variant of blue naevus should be differentiated from desmoplastic-neurotropic melanoma, in which the presence of mucin stromal deposition is a more typical finding.
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Rongioletti et al. (2003) studied this question.
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