differential diagnosis

Last reviewed 01/2018

A malignant melanoma must be discriminated from:

  • benign naevi
  • dermatofibroma
  • pigmented basal cell carcinoma
  • pyogenic granuloma
  • Kaposi's sarcoma
  • vascular malformations
  • seborrhoeic keratosis

If the lesion is gradually changing size or pigmentation, ulcerating or bleeding, then this increases the likelihood that it is a malignant melanoma.

Histology of the lesion is required for diagnosis.