Advanced Health Assessment Practice Exam

What diameter is commonly used to diagnose early melanomas?

1. Greater than 5 mm

2. Greater than 6 mm

3. Greater than 7 mm

4. Greater than 8 mm

The correct answer is: Greater than 6 mm

The diagnosis of early melanomas frequently utilizes the diameter of the lesion as a significant criterion, with a diameter greater than 6 mm being a critical indicator. This measurement is relevant because many melanomas, especially in their early stages, may exceed this size. When assessing moles or skin lesions, practitioners often refer to the “ABCD” rule—Asymmetry, Border irregularity, Color variation, and Diameter—where a diameter greater than 6 mm is a notable factor in identifying atypical moles that may signal the presence of melanoma. Lesions that are smaller than this measurement can still be malignant, but a diameter greater than 6 mm is historically significant for detection and raises greater suspicion for melanoma. It is important for healthcare providers to recognize the significance of size when evaluating skin lesions, coupled with other clinical features. This standard aids in early detection, which is critical for effective management and improved patient outcomes.