نتایج جستجو برای: skull base neoplasm
تعداد نتایج: 447207 فیلتر نتایج به سال:
forty-nine preserved specimens (31 male and 18 female) of trachylepis aurata transcaucsasica were examined with respect to metric and meristic features and dry skull anatomy to assess sexual dimorphism. thirty-one morphological characters and 36 anatomical characters in dry skulls were examined. subdigital lamellae under the forth toe, neck length, neck length/snout vent length, and six skull c...
BACKGROUND Our aim was to grade MRI-detected skull-base invasion in nasopharyngeal carcinoma and evaluate the prognostic value of the grading. METHODS The MRI scans and medical records of 924 patients with histologically diagnosed nondisseminated nasopharyngeal carcinoma were reviewed retrospectively. RESULTS MRI-detected skull-base invasion was not found to be an independent prognostic fac...
BACKGROUND AND PURPOSE Interpretation of CT of the anterior skull base in children depends on knowledge of the pattern and chronology of ossification. The purpose of this study was to ascertain the age at which the anterior cranial fossa is fully ossified as assessed on CT examinations. MATERIALS AND METHODS This was a retrospective review of 127 CT examinations of children ranging from 1 day...
OBJECTIVES/HYPOTHESIS To provide a description of the techniques and limitations of nasoseptal flap takedown and reuse during second-stage and revision endoscopic skull base surgery and review the institutional experience with the use of this reconstructive technique. STUDY DESIGN : Case series. METHODS A retrospective analysis of cerebrospinal fluid (CSF) leak outcomes was performed for a ...
BACKGROUND Several quality of life (QOL) instruments exist for skull base pathology, however, there have been no attempts to appraise and systematically review these instruments. METHODS We systematically reviewed MEDLINE, EMBASE, Central, AMED, Health and Psychosocial Instruments, and PsychoInfo for anterior or central skull base QOL instruments to January 2010. We queried experts, bibliogra...
Treatment goals following skull base surgery have shifted over the last decade to improving functional outcomes and quality of life. Given the intimacy of skull base tumors to vital structures, the potential for morbidity, functional impairments, and a decline in quality of life after surgery is possible. The endoscopic endonasal approach may have potential functional outcome and quality of lif...
Skull base surgery is evolving from traditional transfacial and transcranial approaches to the endoscopic endonasal approach, a less intrusive corridor for accessing the ventral skull base. This technique eliminates facial scars, expedites recovery, and obviates brain retraction. The goals of surgical excision, whether palliative or curative, are identical: an approach that is less disruptive t...
Skull base metastasis from differentiated thyroid carcinoma including follicular thyroid carcinoma (FTC) and papillary thyroid carcinoma (PTC) is a rare clinical entity. Eighteen FTC cases and 10 PTC cases showing skull base metastasis have been reported. The most common symptom of skull base metastasis from FTC and PTC is cranial nerve dysfunction. Bone destruction and local invasion to the su...
Reconstruction materials and techniques for the base of the skull have undergone rapid developments and differentiation in recent years. While mostly autotransplants, collagens or resorbable alloplastic materials are preferred for duraplasties, pronounced organ-specific differences can be observed in the reconstruction of hard tissues. The use of polymethylmethacryl bone cement, once wide-sprea...
The skull base surgery is one of the most demanding surgeries. There are different structures that can be injured easily, by operating in the skull base. It is very important for the neurosurgeon to choose the right approach in order to reach the lesion without harming the other intact structures. Due to the pioneering work of Cushing, Hirsch, Yasargil, Krause, Dandy and other dedicated neurosu...
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