NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,989 terms related to cancer and medicine.
- silicon phthalocyanine 4
- listen (SIH-lih-kon THA-loh-SY-uh-NEEN …)
- A substance being studied in the treatment of cancer. When absorbed by cancer cells and exposed to light, it becomes active and kills the cancer cells. It is a type of photodynamic therapy agent.