Other nasopharyngeal cysts include more lateral benign seromucinous retention cysts (Fig. 10), pharyngeal bursae of Luschka (between the longus colli muscle heads) and oncocytic cysts (Warthin's tumor, not reported in children).
Herniated Nucleus Pulposus. Definition. A herniated disc is a fragment of the disc nucleus which is pushed out of the outer disc margin, into the spinal canal through a tear or rupture.. In the herniated disc's new position, it presses on spinal nerves, producing pain down the accompanying leg. This produces a sharp, severe pain down the entire leg and into the foot.
Sections. If you have been diagnosed with a disc herniation, it can be extremely helpful to know the definition of the condition. Also known as a herniated or ruptured disc, a disc herniation is a type of degenerative spine condition that can lead to neck or back pain in an otherwise healthy individual.hen a disc becomes herniated, the soft, gel-like nucleus material extrudes through a tear in the disc lining and can come into contact with the spinal cord or a nerve in the spinal column.