Thomas Riegel

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OBJECTIVE Microsurgical resection or ventriculoperitoneal shunt placement was for a long time the only means of treatment for patients with colloid cysts. In the past few years, however, endoscopic procedures have gained increasing significance and have been used more widely. Long-term results are now available for the first time, which enabled us to(More)
BACKGROUND The section of geriatric trauma ("AG-Alterstraumatologie") of the "Deutsche Gesellschaft für Unfallchirurgie" (DGU) and the "Lohmann & Birkner Health Care Consulting GmbH" in co-operation with the health insurance funds (VdAK and AEV) supplied the relevant data of approximately 23 million insured persons from the years 2002 to 2004. METHODS All(More)
Secretory meningiomas constitute a relatively rare subtype of meningiomas, accounting for only 1.1% at our institution, with a 6:1 predominance of female patients. This study aimed to obtain more information about the immunohistochemical characteristics of this histological entity, and to analyse the effects of histological factors such as the presence of(More)
Advances in computer technology have permitted virtual reality images of the ventricular system. To determine the relevance of these images we have compared virtual reality simulations of the ventricular system with endoscopic findings in three patients. The virtual fly-through can be simulated after definition of waypoints. Flight objects of interest can(More)
Nowadays multimedia data is produced and consumed at an ever increasing rate. Similarly to this trend, diverse storage approaches for multimedia data have been introduced. These observations lead to the fact that distributed and heterogeneous multimedia repositories exist whereas an unified and easy access to the stored multimedia data is not given. This(More)
OBJECTIVE Monitoring of the oculomotor system during cranial base or brainstem surgery requires extraocular intraorbital insertion of electromyography electrodes. We investigated the use of image-guidance technology for anatomically correct intraorbital electrode placement. METHODS For neuronavigation, an optical tracking system was used in a standard(More)
Plasma coagulation, used in some neurosurgical operative settings, is currently under experimental investigation for the precise assessment of the kind and extent of tissue damage. We established a standardised trial to investigate the effects of helium (argon) plasma coagulation - H(A)PC - on rat brain tissue. The tissue reactions were observed with common(More)
Therapeutic modalities for pineal region tumours are still matter of debate. Endoscopic treatment is a minimally invasive approach. The aim of this study was to assess the quality of life of patients with pineal region tumours who underwent endoscopic procedures. Eight patients (male:3, female 5) were included in this study. Post-operative evaluation of(More)
STUDY DESIGN A retrospective case of an isolated paramedullary hemangioblastoma originating from the first cervical root is reported. OBJECTIVE To describe an uncommon type of spinal hemangioblastoma and its operative treatment. SUMMARY OF BACKGROUND DATA Spinal hemangioblastoma, rare finding accounting for approximately 1.5% to 2.5% of all spinal cord(More)