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Knowing more about different diseases and conditions will make it easier for you to ask your doctor important questions and to take a more active role in keeping you and your family healthy.

Narcolepsy
Native American Health
Naturopathic Medicine
Naturopathy
Nearsightedness (see Myopia)

Neoplasm (see Cancer)
Nervous System
Nervous System Diseases
Neural Tube Defect
Neurofibromatosis

Neurological Diseases (see Nervous System Diseases)
Neurology

Neuromuscular Diseases
Neuropathy
Nevi (see Nevus)
Nevus
Niemann-Pick Disease

Nongonococcal Urethritis
Non-Insulin Dependent Diabetes Mellitus (see Diabetes (Type 2))
Noonan Syndrome
Norplant
Nuclear Medicine

Nurse Midwife (see Midwifery)
Nursing
Nutrition