MALIGNANT INVASIVE PLAQUE-TYPE BLUE NEVUS - A CASE-REPORT AND REVIEW

We present, to the best of our knowledge, the first case of a malignan t, primary plaque-type blue naevus in a 61-year-old male. Two biopsy s pecimens had been examined within 13 years, and revealed a common and cellular blue variant as a precursor. Locally invasive growth and regi onal lymph node swelling were present, but these alone could not confi rm malignancy before evaluation of all clinical and histopathological features, as they are known to occur with benign cellular blue neavi. The recent literature and our case indicate that there is a malignant potential in every histological and clinical variant of blue naevus.