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.
If the soft jelly-like center in the middle of the disc is pushed through the outer disc, a herniated disc occurs â sometimes called a disc protrusion, or âslipped discâ. Even though the term slipped disc is used to describe a herniated disc, the disc does not slip out of place. Sometimes this will cause a pinching or compressing of the spinal nerves (causing pain into the buttocks or legs called sciatica) or the spinal cord (one cause of thigh muscle weakness with walking).