Drs Lipsker et al1 recently reported that in a carefully conducted population-based study there was a dichotomy between the rising incidence of thin melanomas and the stable incidence of thicker lesions. The authors point out that the excision of increasing numbers of thin melanomas has had no effect on the incidence of thick melanomas. They propose as an explanation that thin and thick melanomas have different epidemiological features, and that the increased incidence of this cancer is owing to the recognition of a thin form of melanoma that is innocuous and unlikely to cause death if not treated.
Bystryn J. An Alternate Explanation for the Increase in the Incidence of Melanoma Being Restricted to Patients With Thin Lesions. Arch Dermatol. 2000;136(7):935-936. doi: