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, commonly known as a slipped disc, is a condition in which the central part of the intervertebral disc protrudes into the spinal canal. This typically occurs due to a tear in the tough fibrous annular ring that surrounds a soft inner core, resulting in herniation of the softer material.