Presentation
Persistent left lumboischialgia.
Patient Data
The T2 sequence shows a cystic elongated lesion arising from the synovial membrane of the left L4-L5 facet joint, with signs of pressing against the left adjacent nerve.
Right pelvic kidney.
In the comparison, on an MRI after 6 months later there is no evidence of the cystic lesion in the same patient.
Case Discussion
The epidural growth of cysts into the spinal canal can causes compression of neural structures and their associated clinical symptoms. The clinical presentation of a cyst depends on its volume, site and its relationship to the surrounding bony and neural structures. The most common symptoms are painful radiculopathy (85%), neurogenic single-root or multiroot claudication (44%), sensory loss (43%), and motor weakness (27%). These cysts may develop from any joint lined by synovial membrane.
In this case probably the mechanical stimulus with conservative traetment was the cause of spontaneus resolution.
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