melanotic schwannoma(redirected from melanocytic schwannoma)
melanotic schwannomaA rare form of schwannoma characterised by heavy deposition of melanin pigment (Fontana-Masson, S-100, HMB-45, all +ve) linked to melanosomes and premelanosomes. It is often (50% of cases) associated with Carney syndrome (myxomas in various sites, spotty pigmentation, endocrine hyperactivity).
Most melanotic schwannomas behave benignly; they may metastasise.
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