NCI Dictionary of Cancer Terms

The NCI Dictionary of Cancer Terms features 8,409 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.

Nijmegen breakage syndrome
(NY-may-gen BRAY-kij SIN-drome)
A rare, inherited disorder marked by a small head, height that is shorter than normal, unusual facial features, and other growth and developmental problems. People with Nijmegen breakage syndrome have a weakened immune system, which may cause them to have frequent sinus, lung, and other respiratory tract infections. They are also at an increased risk of developing certain types of cancer, especially non-Hodgkin lymphoma, rhabdomyosarcoma (a type of soft tissue tumor), and brain cancer. Nijmegen breakage syndrome is caused by a mutation (change) in a gene called NBN, which is involved in DNA repair. It is a type of DNA repair deficiency syndrome and a type of autosomal recessive genetic disease.