Hypoxia 2 topics · 2 sources Healthcare› MedicineCancerA condition in which there is a decrease in the oxygen supply to a tissue. In cancer treatment, the level of hypoxia in a tumor may help predict the response of the tumor to the treatment.National Cancer Institute — Dictionary of Cancer Terms Cite Healthcare› MedicineDiabetesLow levels of oxygen in the brain.CA DMV — Diabetes Glossary Cite