Acute XXXX after Unilateral Transforaminal Lumbar Interbody Fusion.

@entity1 @entity3976 @entity1109 @entity1515 @entity1410 @entity717 @entity850 @entity614
OBJECTIVE: Cases of @entity614 after a transforaminal lumbar interbody fusion with a single cage (unilateral TLIF) had been reported, but the phenomenon has not been explained satisfactorily. The purpose of this study was to determine its incidence, causes, and risk factors. METHODS: We did retrospective study with 546 @entity1 who underwent a unilateral TLIF, and used CT and MRI to study the causes of @entity1109 that appeared within a week postoperatively. Clinical and radiological results were compared by dividing the @entity1 into the symptomatic group and asymptomatic group. RESULTS: Contralateral symptoms occurred in 32 (5.9%) of the @entity1 underwent unilateral TLIF. The most common cause of contralateral symptoms was a @entity850 in 22 (68.8%), screw malposition in 4 (12.5%), newly developed @entity3976 in 3 (9.3%), @entity1410 in 1 (3.1%), and unknown origin in 2 @entity1 (6.3%). 16 (50.0%) of the 32 @entity1 received revision surgery. There was no difference in visual analogue scale and @entity717 index between the two groups at discharge. Both preoperative and postoperative contralateral foraminal areas were significantly smaller, and postoperative segmental angle was significantly greater in the symptomatic group comparing to those of the asymptomatic group (p<0.05). CONCLUSION: The incidence rate is not likely to be small (5.9%). If unilateral TLIF is performed for cases when preoperative @entity850 already exists or when a large restoration of segmental @entity1515 is required, the probability of developing @entity614 is increased and caution from the surgeon is needed.
