| Abbreviation | Definition |
|---|---|
| NOEP | Nurse Oncology Education Program |
| NOS | Nevada Oncology Society |
| NOTIS | Northwestern Oncology Trial Information System |
| NPC | NasoPharyngeal Carcinoma |
| NPV | negative predictive value |
| NRCI | Northeast Regional Cancer Institute |
| NRCT | National Register of Cancer Trials |
| NRCT | National Registry of Childhood Tumours, CCRG at Oxford |
| NRK | Normal Rat Kidney Cell |
| NRLT | Non Resectable Lung Tumours |
| NRSTS | Non-Rhabdomyosarcoma Soft Tissue Sarcoma |
| NSA | No Significant Abnormalities |
| NSE | Neuron-Specific Enolase |
| NSHOA | North Shore Hematology Oncology Associates |
| NSR | No Sign of Recurrence |
| NSR | Non-Significant Result |
| NTGO | North Texas Gynecologic Oncology |
| NYOH | New York Oncology Hematology |
| O/E | On Examination |
| OACE | Oncology Acute Care for Elders |