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.
Lumbar Herniated Disc. Lumbar discs are the cushions between the vertebrae in the back. Herniation of the disc occurs when the gelatinous inner disc material, the nucleus pulpous, ruptures, or herniates, through the outer lumbar disc wall.he immediate precipitating cause of the lumbar herniation can be varied. This can be excessive stress being placed on the disc, whether as a result of heavy lifting or other damaging motions. Pain and other symptoms can develop when the damaged disc pushes into the spinal canal or nerve roots.