Patrick B. Cooper

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STUDY DESIGN In vitro cadaveric biomechanical analysis. OBJECTIVE Define the T1 and T2 anatomic lamina size and evaluate the bone-screw interface strength of various pedicle screw options and intralamina techniques. SUMMARY OF BACKGROUND DATA Transpedicular instrumentation is well accepted, but salvage techniques in the proximal thoracic spine are(More)
Subependymomas are rare ependymal neoplasms. To date, a large clinicopathologic study of these benign neoplasms treated with modern neurosurgical techniques has not been reported. Eighty-three cases of subependymoma were retrieved from the files of the Armed Forces Institute of Pathology. Clinicopathological features were reviewed; chromogenic in situ(More)
OBJECTIVE Radiosurgery is increasingly used to manage malignant melanoma brain metastases. We reviewed our series of patients who underwent radiosurgery for melanoma brain metastases to assess clinical outcomes and identify prognostic factors for survival and cerebral disease control. METHODS Two hundred forty-four patients had radiosurgery for the(More)
PURPOSE To evaluate the efficacy and toxicity of gamma knife radiosurgery in the treatment of melanoma metastases to the brain. PATIENTS AND METHODS We retrospectively reviewed 55 patients with single or multiple intracranial melanoma metastases treated at the University of California, San Francisco, with gamma knife radiosurgery from 1991 through 1995.(More)
STUDY DESIGN Retrospective review of medical records and radiographs. OBJECTIVE We assessed the clinical outcomes of lumbosacral dissociation (LSD) after traumatic, combat-related injuries, and to review our management of these distinct injuries and report our preliminary follow-up. SUMMARY OF BACKGROUND DATA LSD injuries are an anatomic separation of(More)
BACKGROUND CONTEXT The most common location for burst fractures occurs at the thoracolumbar junction, where the stiff thoracic spine meets the more flexible lumbar spine. With our current military conflicts in Iraq and Afghanistan, we have seen a disproportionate number of low lumbar burst fractures. PURPOSE To report our institutional experience in the(More)
A 30-year-old man developed unexplained rhabdomyolysis, persistently increased creatine kinase and severe debilitating muscle cramps. After a nondiagnostic neurologic evaluation, he was referred for a muscle biopsy, to include histology/histochemistry, a myoglobinuria panel, and a caffeine halothane contracture test. Only the caffeine halothane contracture(More)
OBJECT Transpedicular instrumentation at C-7 has been well accepted, but salvage techniques are limited. Lamina screws have been shown to be a biomechanically sound salvage technique in the proximal thoracic spine, but have not been evaluated in the lower cervical spine. The following study evaluates the anatomical feasibility of lamina screws at C-7 as(More)
Ependymomas are glial tumors that occur most often in children. In adults, ependymomas most often appear in the spinal cord. The World Health Organization recognizes several rare ependymoma subtypes, including the giant cell ependymoma of the terminal filum. The authors describe an unusual case of a posterior fossa giant cell ependymoma in an 89-year-old(More)
OBJECTIVE AND IMPORTANCE Isolated anaplastic large cell lymphoma (ALCL) presenting in the primary central nervous system is distinctly uncommon. The authors describe a case that clinically and radiographically simulated a primary glial neoplasm. CLINICAL PRESENTATION A 39-year-old immunocompetent male presented with seizures and a rapidly enlarging right(More)