Factors leading to the biopsy of 1547 pigmented lesions at Mayo Clinic, Scottsdale, Arizona, in 2005.

Background: Both physician-driven and patient-driven factors influence biopsy decisions. We sought to determine the ratio of benign to malignant melanocytic biopsy findings in our general dermatology practice and to characterize the reasons for biopsy.

Methods: A retrospective review of institutional records (1 January to 31 December 2005) was undertaken.