HÃ¼rthle cell cancer has the highest incidence of metastasis among the differentiated thyroid cancers. Metastatic disease is reported at the time of initial diagnosis in 10-20% of patients and in 34% of the patients overall.
By Michael Perry, M.D. Foraminal narrowing, or foraminal stenosis, is a condition of the spine that can cause pain and other symptoms resulting from spinal nerve root compression. At every level of the spine, a pair of nerve roots runs through the spinal column via small openings called foramina (singular: foramen).
Description of foraminal stenosis. At every level of the spine, nerve roots branch off the spinal cord and exit the spinal column through small canals. Each of these canals is called an intervertebral foramen or foraminal canal, and foraminal stenosis is a narrowing of this canal.auses of foraminal stenosis. Constriction of the nerve roots leaving the spine in the foraminal canal is typically caused by bone spurs, a herniated or bulging disc, arthritis or ligament thickening.