ABSTRACT
Tethered cord syndrome (TCS) is a clinical diagnosis that can be difficult to establish, as symptoms do not always match classic radiological findings, such as a low-lying conus. Surgery for spinal detethering is not without risk and does not always result in clinical improvement. Prone magnetic resonance imaging (MRI) has been described as a tool to assess the mobility of the spine. This is a technical imaging report where prone imaging was a factor that influenced the decision to defer surgery in favor of conservative management. T1 and T2 sagittal and T1 axial MRI imaging were obtained with the patient supine, and then repeated in the prone position. An anteroposterior conus movement of >10% of the canal width was considered normal. There was significant anterior movement of the conus when switching to the prone position. Surgery was deferred, and the patient improved after a regimen of intensive physical therapy. Prone MRI can be a useful tool to have in our neurosurgical armamentarium when assessing spinal cord tethering. Surgery is not recommended when normal anteroposterior movement of the conus is present.
ABSTRACT
Arteriovenous malformations (AVMs) of the spine include a broad spectrum of lesions that vary from a simple arteriovenous fistulous connection to a more complex net of abnormal vessels involving multiple spinal levels. These entities are poorly studied and understood because of their rarity and are often either managed conservatively with observation if the lesion is complex, or treated surgically or interventionally in the presence of an accessible and distinct fistulous connection. Most surgeons avoid intervening on more intricate lesions until they become symptomatic with progressive neurological decline. We describe the case of a 38-year-old man who presented with severe sharp back pain after an appendectomy procedure. A magnetic resonance angiogram (MRA) revealed an arteriovenous malformation of the conus medullaris, with a compact glomus-type nidus and arterial feeders originating from an enlarged artery of Adamkiewicz. The malformation was resected through a posterior midline approach, and the patient was neurologically intact at his discharge on postoperative Day 2. Follow-up angiography showed complete obliteration of the lesion. Our operative video is meant to serve as a step-by-step and systematic guide to the approach and management of conus arteriovenous spinal lesions, which can be difficult to treat. We provide a pre- and postoperative radiological description of the anomaly as well as a technical guide to the resection of a spinal vascular lesion. This video could serve as an operative guide and reference to neurosurgeons-both established and in training-when confronting similar disease processes in the future.
ABSTRACT
BACKGROUND: Hemicorporectomy involves amputation of the pelvis and lower extremities by disarticulation through the lumbar spine with concomitant transection of the aorta, inferior vena cava, and spinal cord. In addition, conduits are constructed for diversion of both the urinary and fecal streams. Of 57 cases reported in the literature, limited experience exists with hemicorporectomy for terminal pelvic osteomyelitis, with only 11 cases described. Furthermore, there is little information available regarding perioperative mortality and long-term survival. This article describes the largest reported series of hemicorporectomies performed for terminal pelvic osteomyelitis. METHODS: A retrospective review of the medical records for nine patients who underwent hemicorporectomy at the authors' institution was conducted followed by interviews with all surviving patients. RESULTS: At follow-up, four patients were alive and five patients were dead. For all patients, the average survival after hemicorporectomy was 11.0 years (range, 1.7 to 22.0 years). There was no perioperative mortality within 30 days of surgery. None of the surviving patients suffered from recurrent decubitus ulcers. CONCLUSIONS: Including this clinical series, a total of 66 hemicorporectomies have now been reported in the literature. Twenty cases were performed for terminal pelvic osteomyelitis with no mortality within 30 days of surgery, and 53.3 percent of patients were alive and well at long-term follow-up. Given the low perioperative mortality along with the ability of patients to achieve long-term survival following this operation, hemicorporectomy should be offered to appropriate patients suffering from terminal pelvic osteomyelitis.
Subject(s)
Amputation, Surgical/methods , Osteomyelitis/surgery , Pelvic Bones , Plastic Surgery Procedures/methods , Adult , Female , Follow-Up Studies , Humans , Male , Middle Aged , Retrospective Studies , Time FactorsABSTRACT
Hemicorporectomy involves amputation of the pelvis and lower extremities by disarticulation through the lumbar spine with concomitant transection of the aorta, inferior vena cava, and spinal cord, as well as creation of conduits for diversion of the urinary and fecal streams. A review of the literature reveals that the surgical technique has been relatively unchanged since 1960. The standard anterior to posterior approach is associated with significant blood loss and morbidity, likely contributing to lengthy hospital stay. Herein, we describe our back-to-front approach to hemicorporectomy, involving early division of the vertebral structures and spinal cord, pre-empting engorgement of Batson's plexus, thus minimizing blood loss. In addition, this approach greatly improves exposure of the pelvic vessels, allowing for a technically less challenging and safer procedure.
