| Abbreviation | Definition |
|---|---|
| NABCO | National Alliance of Breast Cancer Organizations |
| NACA | National Association for Cancer Awareness |
| NAOG | Network Acute Oncology Group |
| NB | NeuroBlastoma |
| NBCCS | Nevoid Basal Cell Carcinoma Syndrome |
| NBM | Nil By Mouth |
| NBSP | Nhs Breast Screening Programme |
| NCAH | Nonclassical Congenital Adrenal Hyperplasia |
| NCCF | National Children's Cancer Foundation |
| NCCS | National Coalition For Cancer Survivorship |
| NCHG | Nottingham Combined Histologic Grade |
| NCIC | National Cancer Institute of Canada |
| NCL | Nanotechnology Characterization Laboratory |
| NCOA | North Carolina Oncology Association |
| NCOG | Northeren California Oncology Group |
| NCOG | Northern California Oncology Group |
| NCRA | National Cancer Registrars Association |
| NDCR | North Dakota Cancer Registry |
| NDROC | North Dallas Radiation Oncology Center |
| NDSO | Nasolacrimal Drainage System Obstruction |