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KMID : 0388720150220040178
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Journal of Korean Society of Spine Surgery
2015 Volume.22 No. 4 p.178 ~ p.182
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Motor Weakness of Right Ankle Dorsiflexion Caused by Increasing Size of Sacroiliac Joint Cyst after Posterior Lumbar Interbody Fusion in a Patient with Spinal Stenosis: A Case Report
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:Kwon Ji-Eun
:Ahn Young-Joon/:Yang Bo-Kyu/:Yi Seung-Rim/:Lim Se-Hyuk/:Lee Ye-Hyun/:Kim Hae-Min
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Abstract
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Study Design : Case report
Objectives : To report a case of motor weakness caused by the increasing size of a sacroiliac joint cyst after spinal fusion.
Summary of Literature Review : There have been no reports on the increased size of a sacroiliac joint cyst and motor weakness after spinal fusion.
Materials and Methods : A 63-year-old female was admitted with low back pain and right sciatica. Magnetic resonance imaging (MRI) findings showed the spinal canal narrowing at L4-5 and a cystic lesion on the right sacroiliac joint. After surgery, the symptoms were relieved.
Results : One month after the operation, motor function had worsened to grade 4. Follow-up MRI revealed an increase in the size of the cystic lesion. Selective nerve root blocks were performed. There was gradual improvement, and the motor grade reached grade 5 seven months after the operation.
Conclusions : We recommend that surgeons evaluate the adjacent segmental lesion by MRI before performing spinal fusion.
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KEYWORD
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Sacroiliac joint, Cyst, Muscle weakness, Spinal stenosis, Spinal fusion
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