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Differential diagnosis

Authoring team

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.


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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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