title: Hemilaminoplasty for the treatment of lumbar intraspinal synovial cysts (LISCs) and literature review.
abstract: The present report intended to introduce the hemilaminoplasty technique and evaluate the efficacy of our surgical procedure for LISCs.
  
  
  
  This retrospective study was conducted to analyze the results in 24 LISCs who had undergone our hemilaminoplasty between 2000 and 2012 in two hospitals. All were confirmed by pathological histology and mid- to long-term follow-up had been performed in all cases with a mean of 4.9 years. Using the Japanese Orthopedic Association scoring system (JOA score) and visual analog scale (VAS), symptoms resulting from cyst compression were quantified at various stage for statistical analysis.
  
  
  
  The JOA score and VAS of back/leg pain following surgery were improved significantly (P < 0.01). At final follow-up, with normal aging there was a little decrease in JOA score and VAS of back/leg pain, but still significantly improved (P < 0.01). Similarly, mean improvement rate of JOA was 83.5 % at 1 year after surgery while 75.6 % at final visit. Successful bone healing was obtained at a mean of 3.8 months after surgery. No cyst reformation and recurrent back/leg pain were observed around the surgical sites.
  
  
  
  These lesions could be regarded as a result of facet arthrosis/instability and repetitive facet minor trauma with herniation of synovium through the defective joint capsule. Improvement in lumbago and leg pain may be a consequence of complete cyst resection via hemilaminoplasty plus partial facetectomy with anatomical reconstruction of the posterior spinal elements.
authors.affiliation: Department of Trauma, Affiliated Hospital of Medical College, Qingdao University, 59 Haier Road, Qingdao, 266101, Shandong Province, People's Republic of China.
authors.forename: Zuo
authors.initials: Z
authors.lastname: Zhenbo
authors.affiliation: Department of Trauma, Affiliated Hospital of Medical College, Qingdao University, 59 Haier Road, Qingdao, 266101, Shandong Province, People's Republic of China.
authors.forename: Li
authors.initials: L
authors.lastname: Huanting
authors.affiliation: Department of Trauma, Affiliated Hospital of Medical College, Qingdao University, 59 Haier Road, Qingdao, 266101, Shandong Province, People's Republic of China.
authors.forename: Wang
authors.initials: W
authors.lastname: Jin
authors.affiliation: Department of Trauma, Affiliated Hospital of Medical College, Qingdao University, 59 Haier Road, Qingdao, 266101, Shandong Province, People's Republic of China.
authors.forename: Gong
authors.initials: G
authors.lastname: Haifeng
authors.affiliation: Department of Trauma, Affiliated Hospital of Medical College, Qingdao University, 59 Haier Road, Qingdao, 266101, Shandong Province, People's Republic of China.
authors.forename: Fang
authors.initials: F
authors.lastname: Yuan
authors.affiliation: Department of Orthopaedic Surgery, Qilu Hospital of Shandong University, 107 Wenhua Road, Jinan, 250012, Shandong, People's Republic of China. lancet01@163.com.
authors.forename: Li
authors.initials: L
authors.lastname: Ming
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D065406:Laminoplasty; D008159:Lumbar Vertebrae / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013581:Synovial Cyst / Q000601:surgery*
keywords: Degenerative abnormalities; Hemilaminoplasty; Intraspinal synovial cyst