No abstract

Two cases of anterior spinal hernia are presented. The medical literature is reviewed, the syndrome characterised, and its cause and treatment discussed. The patient is typically middle aged with a history of stepwise slowly progressive mid-thoracic anterior hemicord syndrome manifesting as hemianalgesia below the affected segment, followed by contralateral lower limb spasticity that develops into an asymmetric paraparesis with sparing of dorsal column sensation. Radiological investigation demonstrates an enlarged dorsal arachnoid space in association with an apparently focally narrowed thoracic cord, kinked towards the anterior dura. At operation the cord Figure1 Left; patient 1, preoperative Tl weighted spin echo sagittal MRI showingfocal anterior cord tethering at D4. Right; patient 2, preoperative Tl weighted spin echo sagittal MRI showingfocal anterior cord tethering at D8.

Until recently, idiopathic anterior spinal cord herniation was thought to be vanishingly rare. It is an increasingly recognized, readily treatable, condition causing progressive thoracic myelopathy. We have operated on five cases and know of two other patients locally who are as yet undecided on surgery. We are aware of several other unpublished cases in the UK. The syndrome presents typically in middle age with a history of stepwise slowly progressive mid-thoracic anterior hemicord dysfunction characterized by hemianalgesia below the affected segment followed by asymmetric lower limb hypertonia, with initial sparing of posterior column sensation, that progresses through paraparesis to complete paraplegia. The radiological findings, although subtle, are equally typical and surgical repair is easily effected. With increasing clinical and radiological awareness, we believe the apparent incidence of this condition will increase. Idiopathic anterior spinal cord hernia is more common than currently appreciated, and should be positively considered and excluded in every case of progressive thoracic cord dysfunction.

Tracheobronchopathia osteochondroplastica (TO) is a rare benign disease characterized by the presence of osseous and cartilaginous submucosal nodules projecting into the tracheobronchial tree. Most cases are asymptomatic and discovered incidentally at post-mortem. We identified a case of TO on thoracic spiral CT and confirmed the diagnosis of bronchoscopy. This article reviews the imaging characteristics of TO, and shows the 3-D virtual bronchoscopic and multiplanar reconstruction appearances of TO.

Objectives: This study included a series of middle-aged male and female patients who presented with chronic anterior hemicord dysfunction progressing to paraplegia. Imaging of anterior thoracic cord displacement by either a dural adhesion or a dural defect with associated cord herniation is presented. Methods: This is a retrospective review of cases referred to a tertiary neuroscience centre over a 19-year period. Imaging series were classified by two experienced neuroradiologists against several criteria and correlated with clinical examination and/ or findings at surgery. Results: 16 cases were available for full review. Nine were considered to represent adhesions (four confirmed surgically) and four to represent true herniation (three confirmed surgically). In the three remaining cases the diagnosis was radiologically uncertain. Conclusion:The authors propose ''thoracic anterior spinal cord adhesion syndrome'' as a novel term to describe this patient cohort and suggest appropriate clinicoradiological features for diagnosis. Several possible aetiologies are also suggested, with disc rupture and inflammation followed by disc resorption and dural pocket formation being a possible mechanism predisposing to herniation at the extreme end of a clinicopathological spectrum. Anterior spinal cord hernia is a rare and potentially treatable cause of progressive anterior spinal cord syndrome. The cord prolapses through an anterior or anterolateral dural defect, resulting in a progressive, frequently asymmetrical, thoracic myelopathy. Patients typically present in middle age with slowly progressive neurological dysfunction relating to anterior hemicord dysfunction [1, 2]. The condition was described in 1973 by Cobb et al [3], with the first idiopathic case suggested by Wortzman et al [4] a year later; a number of case reports and small series have been published since. The exact causative mechanism has not been fully elucidated. The radiological findings of true herniation are well described but not widely recognised as the number of cases in world literature remains relatively small.In our clinical practice we have identified a number of patients who present with a clinical picture that is indistinguishable from patients with anterior spinal cord herniation and MRI demonstration of anterior cord deviation, but without imaging or surgical evidence of a true cord hernia. Based on this observation, we suspect that true hernia is positioned at the extreme end of a pathological spectrum; other cases of anterior cord deviation and wasting-possibly caused by focal vulnerability, deficiency of the anterior dura or anterior tethering of the cord-appear to present with similar clinical symptoms. Evidence in support of this assertion is the case reported by Ewald et al [5] demonstrating progressive development of an anterolateral T6 cord herniation on successive MRI examinations, with associated progression in clinical symptoms over a 2-year period prior to operative intervention. We propose that the association of thoracic myelopat...

Anterior cervical discectomy (ACD) is standard practice for cervical radiculopathy. Irrespective of the precise method used, it involves more or less complete disc removal with resultant anatomical and biomechanical derangements, and frequently the insertion of a bone or prosthetic graft. Anterior cervical foramenotomy is an alternative procedure that allows effective anterior decompression of the nerve root and lateral spinal cord, whilst conserving the native disc, preserving normal anatomy and movement, and protecting against later degeneration at adjacent spaces as far as possible. The aim of the study was to determine the safety and efficacy of anterior cervical foramenotomy in the treatment of cervical radiculopathy and took the form of a prospective study of 21 cases under the care of a single surgeon. All patients had a single level or two level anterior cervical foramenotomy. All had pre- and postoperative visual analogue scores for arm and neck pain, arm strength, sensation and overall use. A comparison between patients' perceptions and surgeon's observations was also made. Patients were followed up for between 10 and 36 months. Sixty-eight per cent completed full pre- and postoperative assessments. Twenty-eight per cent of the responders had complete arm pain resolution. There were statistically significant reductions in arm and neck pain, and overall disability. The surgeon's impression of improvement paralleled that of the patients. There was one complication with discitis. Anterior cervical foramenotomy is a safe and effective treatment for cervical radiculopathy caused by posterolateral cervical disc prolapse or uncovertebral osteophyte, and might also reduce adjacent segment degeneration.

The rising rate of litigation against all specialities provides an incentive to develop risk management strategies. Much of a neurosurgeon's workload is telephone advice, which is rarely documented formally. This leaves us vulnerable to other clinicians' interpretation of our advice, their record of our conversation and poor accuracy of recall by both parties. We performed a prospective study of all telephone conversations with referring clinicians over 1 year, in order to assess the quality of information transfer. We found that the information received was often inaccurate, documentation of our given advice was poor, and criticism of neurosurgical care was unfounded. We have developed a proforma to be faxed back to the referring team. This will ensure that the information received, and the advice given in return, is recorded formally by both teams. Only time will tell if a joint record such as this will provide sufficient defence against litigation.

Von Recklinghausen's disease of the cervical spine is rare. Spinal deformities appear to occur only in peripheral neurofibromatosis as opposed to central neurofibromatosis, and such deformities include non-dystrophic and dystrophic changes. We describe two patients with neurofibromatosis of the cervical spine who were subjects of simple trauma, one of whom demonstrated dystrophic and the other nondystrophic changes. The first presented with acute upper cervical spine instability and subluxation, the second with cervical myelopathy. The purpose of this article is to heighten the physician's awareness that such patients have inherent pathology in the cervical spine such that simple trauma can have serious neurological consequences.