Hi Gabs!

A VELScope is going highlight any dysplastic areas within the UV light's field giving the operator a way to track and reference dysplasia as it has a dated camera system on it. The VELScope gives the medical professional a better view of the entire dysplastic area not necessarily seen by the naked eye which is why some programs are using it to for better surgical margins, as well as areas to biopsy.

In Dr. Edmund Truelove's lecture (he was the head of the University of Washington's school of Oral Medicine he's used a VELScope in his research) he's shown where Oral Medical specialist trained to spot cancer only could visibly catch it around 60% of the time, where with a VELScope caught it 100%. Remember a biopsy depends on getting a sample of the cancerous tissue to pathology and if the Dr doing the biopsy samples a dysplastic area that's yet to turn malignant it will come back negative, which is why the VELScope is a useful diagnostic tool, as well as a surgical tool for better margins.

Hope that helps. As a disclaimer I am good friends with the product managers at VELScope and I have been approached to lecture to focus groups on their behalf, however to date I've not done so, nor am I on their payroll. I do believe in their product and the science behind it.