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Diffuse posterior disc bulge effaces the ventral thecal sac. What is the meaning?

L3-L4.6 mm diffuse posterior disc bulge effaces the ventral thecal sac and abute the bilateral travesing L4 nerve roots.the disc pathology . peridiscal posterior osteophytes along with bilateral facet and ligamentum flavum hypertrophy result in bilateral neural forminal encroachment and indents the exiting L3 nerve roots
Asked On : Mon, 28 Jan 2013
Answers:  1 Views:  348
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Radiologist 's  Response
Hi, welcome to HCM.
Intervertebral disc is circular in shape. Diffuse disc bulge means increase in its diameter in all directions. It is important only on posterior aspect where it causes effect on spinal canal.
In your case disc between L3 - l4 has such bulge with effective compression of spinal canal. At its lateral aspect it is causing compression of origin of nerve which is main reason for your symptoms.
Please consult your orthopaedician for further management.

Hope I have answered your query.
Answered: Tue, 29 Jan 2013
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