Suzanne --

Actually, I am having PDT next Wednesday for aktinic keratoses on my head, neck and chest. I have had a variety of skin cancers (basal and squamous cell) over the years, and numerous AKs treated with cryotherapy. The wages of sin for 20+ years as a competetive swimmer in California in the days when it was all about Coppertone and SPF wasn't even a known term.

It apparently can do a nice job of handling pre-cancerous lesions, even before they become visible, at least in skin conditions. Hope things turn out well for you!