Purpose of Study. To investigate current practice of thromboprophylaxis in major UK spinal centres for both trauma and elective surgery, and to asses compliance with NICE guidelines. Methods. A telephonic survey was carried out which comprised of questions relating to current practice of thromboprophylaxis in major spinal units across the UK. Questions probed practice with regard to trauma versus elective surgery, agents used, timing of prophylaxis, length of treatment and whether practice has changed since the introduction of NICE guidelines. Results. Thirty specialised centres were contacted. Twenty eight centres followed NICE recommendations, with 2 centres using their own protocol. Four centres made changes to their existing protocols after the emergence of NICE guidelines. GCS (Graduated compression stockings) were uniformly used by all, with most centres using flowtron boots and/or foot in addition. The practices are differing within centres for elective versus trauma surgery. Of note, in patients with an acute cord injury, 20 centres used combined pre operative prophylaxis whereas 10 centres used only mechanical prophylaxis. Three units (10 %) describe a noticeable rise in complications related to chemoprophylaxis, whilst only one unit has reported a PE death within the last year. Discussion. Our survey assesses compliance to the NICE guidelines by the UK's spinal units. Mechanical prophylaxis appears to be the most common mode of prophylaxis understandably due to predictable safety profile. Use of chemo-prophylaxis varies amongst different surgeons and centres. Rather than a result of evidence based practice, the decision appears to be related to the previous experiences of that unit. Although the NICE guidelines provide a reasonable platform to the practice of thromboprophylaxis, more studies are required to evaluate the risks of thrombosis and bleeding events in spinal surgery

There have been very few reports in the literature of gout and pseudogout of the spine. We describe six patients who presented with acute sciatica attributable to spinal stenosis with cyst formation in the facet joints. Cytopathological studies confirmed the diagnosis of crystal arthropathy in each case.

Specific formation of a synovial cyst was identified pre-operatively by MRI in five patients. In the sixth, the diagnosis was made incidentally during decompressive surgery. Surgical decompression alone was undertaken in four patients. In one with an associated degenerative spondylolisthesis, an additional intertransverse fusion was performed. Another patient had previously undergone a spinal fusion adjacent to the involved spinal segment, and spinal stabilisation was undertaken as well as a decompression.

In addition to standard histological examination material was sent for examination under polarised light which revealed deposition of urate or calcium pyrophosphate dihydrate crystals in all cases.

It is not possible to diagnose gout and pseudogout of the spine by standard examination of a fixed specimen. However, examining dry specimens under polarised light suggests that crystal arthropathy is a significant aetiological factor in the development of symptomatic spinal stenosis associated with cyst formation in a facet joint.