NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,791 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.
- in situ
- listen (in SY-too)
- In its original place. For example, in carcinoma in situ, abnormal cells are found only in the place where they first formed. They have not spread.