, Volume 140, Issue 4, pp 169-175

A malignant blue naevus, with metastasis to regional lymph node

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A CASE of malignant blue naevus of the foot with metastasis to an inguinal lymph node is reported and the histological features which led to the diagnosis are presented.

Blue naevi and cellular blue naevi are unusual pigment-producing lesions which do not arise from epidermal melanoblasts but appear to be derived from migrating neural crest cells as suggested by Masson (1951). Malignant blue naevi are extremely rare, and the receipt of such a case has led to the presentation of this report.