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What is Necrotizing Fasciitis? Necrotizing Fasciitis is a rapidly progressive inflammatory infection of the fascia, with secondary necrosis of the...

What is Neuropathic Pain? Neuropathy is the term used to describe a problem with the nerves, usually the 'peripheral nerves'...

What Is Nightmare Disorder? Nightmare disorder, or dream anxiety disorder, is a sleep disorder marked by frequent nightmares. Such nightmares...

What Is Neuroblastoma? Neuroblastoma is a cancer which is known to develop from immature nerve cells found in different areas of...

What Are Nasal Polyps? Nasal polyps are polypoidal masses arising mainly from the mucous membranes of the nose and paranasal sinuses. They are overgrowths of the mucosa that...

What Is Nasopharyngeal Carcinoma? Nasopharyngeal carcinoma (NPC) is the most common cancer originating in the nasopharynx, the uppermost region of...

What Is Nicotine Dependence? Nicotine dependence is an addiction to tobacco products caused by one of its ingredients - the...

What Is Nonallergic Rhinitis? The condition is characterized by a congested nose and chronic sneezing that occurs for no obvious...

What Is Narcolepsy? The disease Narcolepsy is a chronic sleep condition described by overwhelming daytime sleepiness and unexpected occurrences of...

What Is Norovirus Infection ? It is an infection that triggers the immediate onset of intense diarrhea and vomiting. In...