BACKGROUND: @entity1347 ( @entity1347 ) has not been described after laminectomy without fusion. OBJECTIVE: To determine the incidence of @entity1347 after a 1- or 2-level lumbar laminectomy. METHODS: We retrospectively reviewed medical records of all @entity1 who underwent 1- or 2-level, bilateral lumbar laminectomy without fusion for @entity179 (all follow-up >= 1 year). @entity1347 was defined as clinical and/or radiographic evidence of @entity179 that required reoperation at the level above or below the index laminectomy. RESULTS: Of the 398 @entity1 , the incidence of @entity1347 requiring reoperation was 10%. The 39 @entity1347 cases were almost equally distributed at L2-L3 (31%), L3-L4 (26%), and L5-S1 (31%), and to a lesser extent at L4-L5 (15%) (P = .51). The @entity1347 incidences of 10% and 9% were equivalent after a 1- and 2-level laminectomy, respectively (P = .76). Rostral @entity1347 was statistically more common than caudal @entity1347 after both the 1- (P < .001) and 2- (P < .001) level laminectomy. Of the 39 @entity1347 cases, 95% required laminectomy, 26% discectomy, and 49% fusion. Average time to @entity1347 was 4 years. After a Kaplan-Meier analysis, time to reoperation for @entity1347 was equivalent among the 1- and 2-level laminectomy cohorts (log-rank test, P = .13). CONCLUSION: The cumulative incidence of @entity1347 requiring reoperation was 10% over a mean of 4 years. Both the 1- and 2-level laminectomy cohorts experienced equivalent incidences and rates of @entity1347 . Of the 39 operations for @entity1347 , about half required a fusion.

Incidence of Adjacent Segment Disease Requiring Reoperation After Lumbar Laminectomy Without Fusion: A Study of 398 XXXX .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity1347 :: ('MESH:C537775', 'Disease') :: ['ASD', 'Adjacent segment disease'] @entity179 :: ('MESH:D019636', 'Disease') :: ['degenerative spinal disease']
@entity1 :: (9606,Species) :: ['Patients']
