NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,800 terms related to cancer and medicine.
Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.
- listen (BOM-beh-sin)
- A peptide (small protein) found in the brain, gastrointestinal tract, and lungs. It causes the release of certain hormones and enzymes. It also causes smooth muscles to contract. Bombesin is found at high levels on small cell lung cancer cells and on other types of cancer cells. It is a type of neuropeptide and a type of hormone.