Australian Dental Council (ADC) Practice Test

The correct option reflects the understanding that a small but significant percentage of pigmented naevus, commonly known as moles, have the potential to undergo malignant transformation into melanoma. Studies suggest that around 10 to 15% of these lesions can progress to cancerous forms under certain conditions, such as genetic predisposition or environmental factors like UV exposure.

This information is critical in dermatology and oncology, where monitoring pigmented lesions for changes is an essential part of skin cancer prevention and detection strategies. Although benign in the majority of cases, regular evaluation of pigmented naevus is important because identifying changes early could lead to timely intervention.

In contrast, the other options do not accurately represent the risk. Suggesting that it is 'always' or 'never' could mislead about the dynamic nature of these lesions. Identifying a specific percentage like 5% underestimates the risk compared to the widely recognized range. Thus, acknowledging the correct range helps in making informed clinical decisions and educating patients about the importance of monitoring their skin health.