Sellar tumors are most commonly approached through the transsphenoidal corridor, and tumor resection is most often performed using the operating microscope. More recently the endoscope has been introduced for use either as an adjunct to or in lieu of the microscope. Both the microscopic and endoscopic transsphenoidal approaches to sellar tumors allow safe and effective tumor resection. The authors describe their current endoscopic technique and elucidate the advantages and disadvantages of the pure endoscopic adenomectomy compared with the standard microscopic approach.
John A. Jane Jr., Joseph Han, Daniel M. Prevedello, Jay Jagannathan, Aaron S. Dumont and Edward R. Laws Jr.
Jay Jagannathan, Daniel M. Prevedello, Vivek S. Ayer, Aaron S. Dumont, John A. Jane Jr. and Edward R. Laws
In this study the authors address the efficacy and safety of frameless stereotaxy in transsphenoidal surgery.
One thousand transsphenoidal operations were performed at the authors' institution between June 2000 and July 2005. This series consists of a retrospective review of 176 patients entered in a prospectively obtained database who underwent frameless stereotactic transsphenoidal surgery in which magnetic resonance (MR) imaging, computerized tomography (CT) scanning, or fluoroscopic guidance was used. Of the 176 patients, 104 (59%) had suprasellar extension of their tumor, 70 (40%) had involvement of the visual apparatus, and 65 (37%) had cavernous sinus involvement. All patients underwent detailed pre- and postoperative neurological, endocrinological, radiographic, and ophthalmological follow-up evaluations. Records were reviewed retrospectively for intraoperative and postoperative complications related to the surgical approach.
No instances of visual deterioration, carotid artery (CA) stenosis, or stroke were observed following transsphenoidal surgery. Only one patient sustained damage to the CA intraoperatively, and this was controlled in the operating room. Five patients (3%) required an intensive care unit stay postoperatively. Intraoperative cerebrospinal fluid leakage was encountered in 112 patients (64%) and was more frequently observed in tumors with suprasellar involvement.
Frameless stereotaxy is a safe and effective modality for the treatment of recurrent or invasive sellar masses. All three frameless stereotaxy modalities provided accurate information regarding the anatomical midline and the trajectory to the sella turcica. The MR imaging, CT scanning, and fluoroscopic stereotaxy modalities all have unique advantages as well as specific limitations.
Jay Jagannathan, Aaron S. Dumont, Daniel M. Prevedello, Christopher I. Shaffrey and John A. Jane Jr.
✓Sports-related injuries to the spine, although relatively rare compared with head injuries, contribute to significant morbidity and mortality in children. The reported incidence of traumatic cervical spine injury in pediatric athletes varies, and most studies are limited because of the low prevalence of injury. The anatomical and biomechanical differences between the immature spine of pediatric patients and the mature spine of adults that make pediatric patients more susceptible to injury include a greater mobility of the spine due to ligamentous laxity, shallow angulations of facet joints, immature development of neck musculature, and incomplete ossification of the vertebrae. As a result of these differences, 60 to 80% of all pediatric vertebral injuries occur in the cervical region. Understanding pediatric injury biomechanics in the cervical spine is important to the neurosurgeon, because coaches, parents, and athletes who place themselves in positions known to be associated with spinal cord injury (SCI) run a higher risk of such injury and paralysis. The mechanisms of SCI can be broadly subclassified into five types: axial loading, dislocation, lateral bending, rotation, and hyperflexion/hyperextension, although severe injuries often result from a combination of more than one of these subtypes. The aim of this review was to detail the characteristics and management of pediatric cervical spine injury.
Jay Jagannathan, David O. Okonkwo, Aaron S. Dumont, Hazem Ahmed, Abbas Bahari, Daniel M. Prevedello, John A. Jane Sr. and John A. Jane Jr.
The authors examine the indications for and outcomes following decompressive craniectomy in a single-center pediatric patient population with traumatic brain injury (TBI).
A retrospective review of data was performed using a prospectively acquired database of patients who underwent decompressive craniectomy at the authors' institution between January 1995 and April 2006. The patients' neuroimages were examined to evaluate the extent of intracranial injury, and the patients' records were reviewed to determine the admission Glasgow Coma Scale (GCS) score, the extent of systemic injuries, the time to craniectomy, and the indications for craniectomy. Long-term functional outcome and independence levels were evaluated using the Glasgow Outcome Scale (GOS) and a Likert patient quality-of-life rating scale.
Twenty-three craniectomies were performed in children during the study period. The mean patient age at craniectomy was 11.9 years (range 2–19 years). In all patients, the computed tomography scans obtained at presentation revealed pathological findings, with diffuse axonal injury and traumatic contusions being the most common abnormalities. The median presenting GCS score was 4.6 (range 3–9). Nineteen patients (83%) suffered from other systemic injuries. One patient (4%) died intraoperatively and six patients (26%) died postoperatively. Postoperative intracranial pressure (ICP) control was obtained in 19 patients (83%); an ICP greater than 20 mm Hg was found to have the strongest correlation with subsequent brain death (p = 0.001). The mean follow-up duration was 63 months (range 11–126 months, median 49 months). The mean GOS score at the 2-year follow-up examination was 4.2 (median 5). At the most recent follow-up examination, 13 (81%) of 16 survivors had returned to school and only three survivors (18%) were dependent on caregivers.
Although the mortality rate for children with severe TBI remains high, decompressive craniectomy is effective in reducing ICP and is associated with good outcomes in surviving patients.