σε τελική ανάλυση με στένωση του τρήματος έχουμε να κάνουμε...

Encroachment:
It is a reduction in the normal anatomic volume of the spinal canal or foraminal space.
http://www.mribhatia.com/spinetf6/spinetf6text.html.

...a decrease in the foraminal interval (foraminal encroachment)...
http://books.google.com/books?id=nlUR1toYU8UC&lpg=PA83&dq="f...


...will contort the foramina. This is referred to as foraminal encroachment...
http://books.google.com/books?id=k8qv-6tqZL0C&lpg=PA69&ots=_...

Significant narrowing of the IVF is called foraminal encroachment and can lead to nerve root irritation.
http://books.google.com/books?id=nVIPTDpGR24C&lpg=PA160&dq="...

...This condition of foraminal encroachment, which goes by other names such as foraminal stenosis and spinal foraminal stenosis...
http://www.laserspineinstitute.com/back_problems/foraminal_s...

http://www.google.com/search?q=μείωση εύρους μεσοσπονδύλιου ...