UNASSIGNED: OBJECT The authors sought to determine @entity1 -related outcomes after minimally invasive surgical (MIS) lumbar intra-spinal @entity12897 via a tubular working channel and a contralateral facet-sparing approach. METHODS All the @entity1 with a symptomatic lumbar intraspinal synovial cyst who underwent surgery at the University of Iowa Hospitals and Clinics with an MIS excision via a contralateral approach were treated between July 2010 and August 2014. There was a total of 13 cases. Each @entity1 was evaluated with preoperative neurological examinations, lumbar spine radiography, MRI, and visual analog scale (VAS) scores. The @entity1 were evaluated postoperatively with neurological examinations and VAS and Macnab scores. The primary outcomes were improvement in VAS and Macnab scores. Secondary outcomes were average @entity190 , hospital stay duration, and operative times. RESULTS There were 5 males and 8 females. The mean age was 66 years, and the mean body mass index was 28.5 kg/m(2). Sixty-nine percent (9 of 13) of the cysts were at L4-5. Most @entity1 had @entity1643 and @entity158 , and one-third of them had Grade 1 spondylolisthesis. The mean (   SD) follow-up duration was 20.8    16.9 months. The mean Macnab score was 3.4    1.0, and the VAS score decreased from 7.8 preoperatively to 2.9 postoperatively. The mean operative time was 123    30 minutes, with a mean estimated @entity190 of 44    29 ml. Hospital stay averaged 1.5    0.7 days. There were no complications noted in this series. CONCLUSIONS The MIS excision of lumbar intraspinal @entity12897 via a contralateral approach offers excellent exposure to the cyst and spares the facet joint at the involved level, thus minimizing risk of instability, @entity190 , operative time, and hospital stay. Prospective randomized trials with longer follow-up times and larger cohorts are needed to conclusively determine the superiority of the contralateral MIS approach over others, including open or ipsilateral minimally invasive surgery.

Minimally invasive resection of lumbar intraspinal XXXX via a contralateral approach: review of 13 cases.

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity1643 :: ('MESH:D017116', 'Disease') :: ['low-back pain'] @entity190 :: ('MESH:D006473', 'Disease') :: ['blood loss'] @entity12897 :: ('MESH:D013581', 'Disease') :: ['synovial cyst excision', 'synovial cysts'] @entity158 :: ('MESH:D010146', 'Disease') :: ['radicular pain']
@entity12897 :: (MESH:D013581,Disease) :: ['synovial cysts']
