". . . no significant changes in histologic criteria had occurred over time that would explain the rise in melanoma incidence."Rigel DS, Friedman RJ, Kopf AW et al. The incidence of malignant melanoma in the United States: Issues as we approach the 21st century. JAAD 1996;34:839–47.

Is the statement of Rigel, Friedman, and Kopf true? A reader should be able to decide on the basis of the evidence that follows.