Category: N

A relatively rare and severe form of periodontal disease, marked by destruction of the gingiva and ulcerations of the epithelium of the mouth. It is associated with infection with multiple oral microbes.  

Gigantism in which the bodily proportions and sexual development are normal, usually the result of hypersecretion of growth hormone. A form of gigantism where all bodily functions operate normally.  

Those minimally chemically reactive gases found in group 18 of the periodic table, formerly known as inert gases. They include: argon, helium, krypton, neon, radon, and xenon.  

A toxic gas administered in very small concentrations during mechanical ventilation to treat persistent pulmonary hypertension.  

A ganglion of the trunk of the vagus nerve located immediately below the jugular ganglion. It connects with the spinal accessory nerve, the hypoglossal nerve, and the superior cervical ganglion of the sympathetic trunk.  

Joining of the nucleus of small atoms to form larger atoms. It occurs when temperatures reach millions of degrees. An example is the nuclear reaction joining hydrogen together to form helium and resulting in the significant release of energy.  

The surgical correction of an esophageal hiatal hernia or gastroesophageal reflux, by wrapping the gastric cardia with adjacent portions of the gastric fundus. This procedure, which is frequently performed laparoscopically, reestablishes the gastroesophageal angle, enhances the lower esophageal sphincter, and prevents intrathoracic displacement of the stomach.  

The vapors of nitric acid (HN03). They are used in various chemical processes. Poisoning is produced by the action of the corrosive fumes on the respiratory tract.  

A nondisplaced transverse fracture of the ulna resulting from a direct blow.  

The cavity between the anterior opening to the nose and the nasopharynx.