169NAA-10-related neurodevelopmental syndrome (NAA10相關神經發育綜合症)
170NAA15 Gene Mutation (Genetic Disorder)
171Nemaline Myopathy (桿狀體肌肉病變)
172Neuroendocrine Tumor (NET) (神經內分泌腫瘤)
173Neurofibromatosis (NF) - Type 1 (神經纖維瘤第1型)
174Neurofibromatosis (NF) - Type 2 (神經纖維瘤第2型)
175Neuromyelitis Optica (NMO) (視神經脊髓炎)
176Nicolaides-Baraitser Syndrome (NCBRS)
177Niemann-Pick Disease Type C (NPC) (尼曼匹克症C型)
178Niemann-Pick Disease Type C1 (NPC1) (尼曼匹克症C1型)
179Non-infectious Non-Anterior (NINA) Uveitis (非感染性非前段葡萄膜炎)
180Noonan Syndrome (努南氏症候群)