What is the recommended procedure and margin for excisional biopsy of a suspected melanoma?

The recommended procedure for a suspected melanoma is an excisional biopsy that allows for complete removal of the lesion with appropriate margins. The guideline typically suggests a margin of 2mm for the biopsy. This approach is vital as it not only aids in accurate histopathological assessment but also minimizes the risk of residual melanoma at the surgical site. A margin of 2mm is considered sufficient to reduce the chances of leaving behind malignant cells, which can complicate treatment and prognosis.

Excisional biopsy is preferred over incisional biopsy in cases of suspected melanoma, as it provides a clear view of the lesion's characteristics and ensures comprehensive sampling of the surrounding skin. Moreover, obtaining a sufficient margin is crucial for both diagnostic purposes and potential curative treatment, which is essential given the aggressive nature of melanoma if not adequately addressed.

Using incisional biopsy, regardless of the margin size, does not allow for complete removal of the tumor, thus potentially leaving viable cancerous cells behind and complicating future treatment strategies.