− | The lesions appear as masses that are friable and ulcerated. Many amyloid-producing odontogenic tumours are melanotic which makes them difficult to distinguish from the more aggressive malignant melanoma. They can erode but not infiltrate adjacent bone. | + | The lesions appear as masses that are friable and ulcerated. Many amyloid-producing odontogenic tumours are [[Neoplasia - Pathology#Nomenclature|melanotic]] which makes them difficult to distinguish from the more aggressive malignant melanoma. They can erode but not infiltrate adjacent bone. |