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  • Natural Killer (NK) Cells - White blood cells that contain granules with enzymes lethal to other cells.
  • Needle Biopsy - Type of lymph node biopsy in which a small tissue sample is removed using a slender needle placed through the skin and into the suspicious lymph node; also known as fine-needle aspiration (FNA).
  • Negative - Describing a tissue sample in which no cancer cells are found.
  • Neoadjuvant Therapy - Treatment given prior to or immediately after the primary treatment. The purpose is to shrink tumors before surgery or to increase tolerance to chemotherapy or immunotherapy drugs.
  • Neoplasm - Any new abnormal growth. A neoplasm may be benign or malignant.
  • Neuropsychiatric - Having to do with physical and mental diseases of the nervous system (the brain, spinal cord, and nerves).
  • Nevus - (Plural - Nevi) a mole.
  • Nitrosoureas - A class of chemotherapeutic agents, including carmustine and lomustine, that have been studied in the treatment of metastatic melanoma.
  • Nodular Melanoma - Type of melanoma that usually appears as a blue-black, dome-shaped nodule on the trunk, head, or neck. Nodular melanomas tend to invade more quickly than other types of melanoma and represent 10% to 15% of all melanomas.