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.
A severe bulging neck disc, with tearing of the outer layers of the disc is called a herniated disc in neck and involves the disc pushing into the spinal canal. In the case of a herniated disc in neck, the herniation occurs in the cervical spine (neck). All other herniated disc conditions, thoracic and lumbar, are called herniated discs in the back. Although quite uncommon, a herniated disc can occur in the thoracic region of the spine.