Nasogastric tube   
A catheter inserted into the stomach through the nose and throat.

National Cancer Institute   
U.S. Government agency charged with promoting research and new treatment of cancer.

Nausea   
A sensation of needing to vomit.

Needle biopsy   
A procedure in which a needle is advanced into a tumor mass in order to obtain a small piece of the tumor.

Neoadjuvant therapy   
Refers to treatments such as chemotherapy or combined chemotherapy and radiation therapy when they are given before surgical treatment.

Neoplasm   
A new growth of tissue or cells; a tumor that is generally malignant.

Neutropenia   
A decreased number of neutrophils, a type of white blood cell.

Non-Hodgkin’s lymphoma   
A cancer of the lymphatic system. Non-Hodgkin’s lymphoma is related to Hodgkin’s disease, but is made up of different cell types. See Lymphoma.

Non-small cell lung cancer   
The most common type of lung cancer, it accounts for 75-80% of all lung cancers.