Can a laser scan catch mouth cancer before it spreads?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion criteria for patients 1. Adult aged 18 and older 2. One of the following criteria must be met: 1. Has a medical condition for which biopsy of oral tissue has been indicated. 2. Is undergoing inspection for early oral cancer 3. Willing and able to comply with all study procedures. Exclusion criteria for patients 1. Has a bleeding disorder, such as haemophilia, or has contraindication for having a biopsy. 2. Severe co-morbid illness, such as end-stage renal failure (ESRF), congestive cardiac failure (CCF), severe osteoarthritis (OA) and rheumatoid arthritis (RA) requiring long term non-steroidal anti-inflammatory drug (NSAID) therapy and any other immunosuppression / immuno-modulation therapy. 3. Has other severe acute or chronic medical or psychiatric condition where use of the device may cause unnecessary stress 4. Any condition that under judgment of the investigator would make the subject unsuitable as it may interfere with interpretation of study results 5. Currently using any compound recognised as acting as a light sensitizer / has a recognised condition associated with light sensitisation / tissue sensitivity to light such as photodynamic therapy or lupus. 6. Is pregnant or breastfeeding 7. Has a laboratory abnormality in medical record that may interfere with the interpretation of study results Inclusion criteria for healthy volunteers 1. Adult aged 18 and older. 2. Willing and able to comply with all study procedures. Exclusion criteria for healthy volunteers 1. Has a medical condition for which biopsy has been indicated or is undergoing inspection for early cancer. 2. Severe co-morbid illness, such as end-stage renal failure (ESRF), congestive cardiac failure (CCF), severe osteoarthritis (OA) and rheumatoid arthritis (RA) requiring long term non-steroidal anti-inflammatory drug (NSAID) therapy and any other immunosuppression / immuno-modulation therapy. 3. Has other severe acute or chronic medical or psychiatric condition where use of the device may cause unnecessary stress 4. Any condition that under judgment of the investigator would make the subject unsuitable as it may interfere with interpretation of study results 5. Currently using any compound recognised as acting as a light sensitizer / has a recognised condition associated with light sensitisation / tissue sensitivity to light such as photodynamic therapy or lupus. 6. Is pregnant or breastfeeding