Thanks for the clarification, Brian.

Here's part of the Reuters story (you can see the whole thing on Google News), which is far more in keeping with the conclusions of the journal article:
[quote] CANCER-HEAD/
BC-CANCER-HEAD/
Factors behind head and neck cancer revealed
By Will Dunham
WASHINGTON (Reuters)

Leslie

April 2006: Husband dx by dentist with leukoplakia on tongue. Oral surgeon's biopsy 4/28/06: Moderate dysplasia; pathology report warned of possible "skip effect." ENT's excisional biopsy (got it all) 5/31/06: SCC in situ/small bit superficially invasive. Early detection saves lives.