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.
What is a herniated disc? A herniated disc is a disc that extrudes into the spinal canal. It is also referred to as a bulging disc, ruptured disc or slipped disc. As a disc degenerates, it can herniate (the inner core extrudes) back into the spinal canal, as shown in this picture on the right. The light blue oval area is the disc, and it is bulging into the spinal canal on the lower right side of the disc. A lumbar herniated disc can cause pain to radiate all the way down the legs and into the foot. In the area of the cervical spine, the pain would radiate from the neck, down the arm and into the fingers.