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.
âA herniated discâalso known as a slipped, ruptured or prolapsed discâis a rupturing of the tissue that separates the vertebral bones in your spine. This occurs when the outer layer of the disc, or annulus, ruptures, allowing the crabmeat-like filling or nucleus of the disc to leak out.