According to the ABCD rule, what diameter is a concerning feature for skin lesions?

The ABCD rule is a useful mnemonic for identifying potentially malignant melanoma by assessing specific features of skin lesions. The "D" in the ABCD rule stands for "Diameter." According to this guideline, a concerning feature for skin lesions is a diameter greater than 6 mm. This threshold is important because melanoma is often greater than this size when it becomes symptomatic or noticeable, highlighting that any lesion with a diameter larger than 6 mm may warrant further evaluation or biopsy.

Lesions less than this size can still be problematic but are typically more associated with benign conditions. By understanding that a diameter greater than 6 mm indicates increased risk, healthcare providers can prioritize assessments and interventions for patients at risk for skin cancer.