killer cell – NB1011 – NBI-3001 – NCI – nebulizer – neck dissection – needle biopsy – needle-localized biopsy – negative axillary lymph node – negative test result – nelarabine – nelfinavir mesylate – neoadjuvant therapy – neoplasia – neoplasm – nephrotomogram – nephrotoxic – nephroureterectomy – nerve block – nerve grafting – nerve-sparing radical prostatectomy – nerve-sparing surgery – neuro-oncologist – neurobehavioral – neuroblastoma – neuroectodermal tumor – neuroendocrine – neuroendocrine tumor – neuroepithelial – neurofibroma – neurofibromatosis type I – neurofibromatosis type 2 – neuroma – neuron – neuropathologist – neuropathy – neuropeptide – neuroradiologist – neurotoxicity – neurotoxin – neurotropism – neutropenia – neutrophil – nevus – NF1 – NG-monomethyl-L-arginine – niacinamide – nicotinamide – NIH – nilutamide – nimodipine – nipple discharge – nitrocamptothecin – nitrosourea – NK cell – NMRI – node-negative – node-positive – nodular parenchyma – nolatrexed – non-Hodgkin's lymphoma – non-small cell lung cancer (NSCLC) – nonconsecutive case series – noncontiguous lymphoma – nonhematologic cancer – noni – nonlytic – nonmalignant – nonmalignant hematologic disorder – nonmelanoma skin cancer – nonmelanomatous – nonmetastatic – nonopioid – nonprescription – nonrandomized clinical trial – nonseminoma – nonspecific immune cell – nonsteroidal anti-inflammatory drug – nonsteroidal aromatase inhibitor – novobiocin – NPO – NR-LU-10 antigen – NSAID – nuclear magnetic resonance imaging – nuclear medicine scan – nutraceutical – nystatin O O(6)-benzylguanine – oat cell cancer – objective improvement – objective response – oblimersen – obtundation – occult stage non-small cell lung cancer – octreotide – ocular melanoma – ofloxacin – OGX-011 – oblimersen – oligoastrocytoma – oligodendroglial tumor – oligodendroglioma – oltipraz – omega-3 fatty acid – omentectomy – omentum – omeprazole – Ommaya reservoir – oncogene – oncologist – oncology – oncology nurse – oncology pharmacy specialist – oncolysate – oncolysis – oncolytic – Oncolytic virus – Onconase – ondansetron – ONYX-015 – oophorectomy – open biopsy – open colectomy – open label study – opioid – opportunistic infection – oral and maxillofacial surgeon – orchidectomy – orchiectomy – oropharynx – OSI-7904L – osmolality – osteitis deformans – osteogenic sarcoma – osteolytic – osteoporosis – osteosarcoma – ostomy – ovarian ablation – ovarian epithelial cancer – ovarian suppression – Overall Survival (OS) – overexpress – overgrowth syndrome – oxaliplatin – oxandrolone – OXi-104 – oxidative metabolism – oxidative stress P P-32 – p-value – p53 gene – Pacific valerian – paclitaxel – Paget's