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.
Herniated Disc Cause #2: Injury. A herniated disc can also be caused by an injury. You can herniate a disc in a car accident, for example: the sudden, jerking movement can put too much pressure on the disc, causing it to herniate. Or you can herniate a disc by lifting a heavy object incorrectly, or by twisting extremely.