NCI Dictionary of Cancer Terms

The NCI Dictionary of Cancer Terms features 8,492 terms related to cancer and medicine.

We offer a widget that you can add to your website to let users look up cancer-related terms. Get NCI’s Dictionary of Cancer Terms Widget.

Noonan syndrome
(NOO-nun SIN-drome)
A genetic disorder marked by unusual facial features, being shorter than normal, learning problems, heart defects, bleeding problems, defects in the skeleton (bones of the body), and fertility problems in males. People with Noonan syndrome have an increased risk of certain types of cancer, such as rhabdomyosarcoma (a soft tissue tumor), neuroblastoma (cancer of immature nerve cells), and some types of leukemia.