Endoscopy is a standard part of the evaluation of patients with head and neck cancer used
for determining the extent of tumor involvement. However, not all areas involved by tumor
are apparent visually. Preliminary results indicate that compared with normal tissues,
tumors have abnormal levels of capillary oxygenation. The purpose of this study is to
determine the ability of non-pulsatile visible light tissue oxygen monitoring to
differentiate normal and tumor tissue based on capillary oxygenation during endoscopy
Should this be possible, this method could be used to mark tumor extent and invasion, even
when that invasion is up to 5mm blow the tissue surface.
Inclusion Criteria:All patients with newly diagnosed head and neck cancer as well as those
being seen for routine follow up with no evidence of current disease and healthy
volunteers are eligible for this study.