CT Guided Aspiration of a Cervical Synovial Cyst. Case Report and Technical note.

SUMMARY: Synovial cysts are cystic dilations of synovial sheaths with or without anatomical continuity within a joint space that occasionally involve the lumbar spine. Image-guided aspiration has been used successfully in the management of lumbar synovial cysts. Synovial cysts of the cervical spine are rare, tend to present with myelopathic symptoms, and are classically treated using operative intervention.We report a novel approach for cervical synovial cyst aspiration under CT guidance. A 66-year-old woman presented to the clinic complaining of severe pain, tingling, and dysesthesia in her right upper extremity in the C5, C6 and C7 nerve root distribution. MR imaging of her cervical spine showed a synovial cyst within the right C6-C7 neural foramen with significant compression and obliteration of the C7 nerve root. The patient underwent CT-guided aspiration of the cyst using a double needle technique, where one needle was used to open up the epidural space while another aspirated the cyst. This was followed by epidural injection of local anesthetic and steroids. Immediately after injection, the patient experienced complete relief of her right forearm pain, tingling, and dysesthesias. The patient tolerated the procedure well and there were no postprocedure complications. At four year follow-up the patient is free of any symptoms. Image-guided aspiration of cervical synovial cysts is feasible using CT fluoroscopy. Aspiration of these cysts combined with epidural steroid injection can provide long-lasting symptomatic relief in some patients.