Abstract:
:Ki-67 antigen is used as a marker of proliferative activity that is linked to growth rate, invasiveness and prognosis of pituitary adenomas. So far the distribution of Ki-67 index within an individual adenoma has not been investigated. If Ki-67 antigen expression differs significantly within an individual pituitary adenoma, a sampling error may result when assessing small fragments of adenoma tissue. Such a potential error would diminish the value of Ki-67 as a tool for postoperative patient management considerations. The aim of the present study was to assess Ki-67 proliferation rates in different regions of pituitary adenomas and to statistically analyse these data for potential regional differences within each tumor. Ki-67 proliferation index was assessed in smear preparations of 100 specimens of 26 consecutive patients operated on for pituitary adenoma in the Department of Neurosurgery, Medical University Vienna. Depending on the size and extent of the tumor, a mean of 4 tissue samples (range 2-8) was selected intraoperatively from each adenoma from endosellar, suprasellar, parasellar, and basal sellar dural locations. Overall mean cell proliferation rate measured by Ki-67 was 1.81 +/- 0.90% (range 0.33-3.43%). Histologically invasive adenomas had significantly higher mean Ki-67 proliferation index in all samples from the same tumor than non-invasive adenomas (2.01 +/- 0.91% vs. 1.11 +/- 0.59%; P = 0.024). Multiregional sampling revealed a homogenous distribution of Ki-67 index throughout an individual adenoma with no significant differences between any two different regions on t-test. Our data confirm that location of a biopsy does not influence Ki-67 index. Therefore, Ki-67 index of a single biopsy is representative for the whole individual adenoma. Thus Ki-67 index can be considered a reliable parameter for assessment of cell proliferation rate in adenoma biopsies and may be used for postoperative patient management considerations.
journal_name
Acta Neurochir (Wien)journal_title
Acta neurochirurgicaauthors
Wolfsberger S,Kitz K,Wunderer J,Czech T,Boecher-Schwarz HG,Hainfellner JA,Knosp Edoi
10.1007/s00701-004-0390-5subject
Has Abstractpub_date
2004-12-01 00:00:00pages
1323-7; discussion 1327-8issue
12eissn
0001-6268issn
0942-0940journal_volume
146pub_type
杂志文章abstract:BACKGROUND:Rathke's cleft cyst (RCC) with significant squamous and/or stratified epithelium including smooth transition from single cuboidal to squamous epithelium (tRCC) is rare and possibly represents an intermediate form to craniopharyngioma. METHODS:Twelve patients with histologically confirmed tRCC were retrospec...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-012-1593-9
更新日期:2013-06-01 00:00:00
abstract::Serpentine aneurysms of the posterior cerebral artery (PCA) treated by the internal maxillary artery (IMA) bypass are rare. Here, the authors report the case of a 34-year-old male patient who presented with a half-year history of gradual severe headache and right-sided limb monoparesis and paresthesia lasting for 1 we...
journal_title:Acta neurochirurgica
pub_type: 杂志文章,评审
doi:10.1007/s00701-019-03902-8
更新日期:2019-06-01 00:00:00
abstract:BACKGROUND:Microvascular decompression (MVD) for hemifacial spasm (HFS) has been popular, but it may take enough time to master this special operative technique and procedure. This may induce uneven distribution of the number of MVD operations in each institute, possibly resulting in an overall unsatisfactory quality o...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-013-1724-y
更新日期:2013-09-01 00:00:00
abstract:OBJECTIVE:To review current management strategies for olfactory groove meningioma (OGM)s and the recent literature comparing endoscopic endonasal (EEA) with traditional transcranial (TCA) approaches. METHODS:A PubMed search of the recent literature (2011-2016) was performed to examine outcomes following EEA and TCA fo...
journal_title:Acta neurochirurgica
pub_type: 杂志文章,评审
doi:10.1007/s00701-017-3303-0
更新日期:2017-10-01 00:00:00
abstract:BACKGROUND:The wide variety of intraspinal cystic lesions necessitates different elaborate diagnostic procedures to choose the right therapeutic management in symptomatic patients. Based on the case reports of seven patients with symptomatic spinal arachnoid cysts we discuss the aetiology, diagnostic procedures and the...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s007010170102
更新日期:2001-01-01 00:00:00
abstract::Microvascular decompression (MVD) has come to stay as an effective way of treating hemifacial spasm. But it remains to be seen how much each of the electrophysiological monitoring techniques (intra-operative) are contributing to its increased efficacy. Their role as indicators for re-exploration or recurrence is to be...
journal_title:Acta neurochirurgica
pub_type: 临床试验,杂志文章
doi:10.1007/s007010170091
更新日期:2001-01-01 00:00:00
abstract::The operative technique of limited approaches to extramedullary spinal tumours is described. The results after unilateral approaches are as satisfying as after standard laminectomies. The rationale of attempting an unilateral approach is to avoid damage to the dorsal static structures of the vertebral column. Access g...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/BF01401426
更新日期:1983-01-01 00:00:00
abstract::Changes in vestibulospinal evoked potentials (VsEP) and motor evoked potentials (MEP) were examined in 10 cats before and after two different weight-dropping spinal cord injuries. In six animals somatosensory evoked potentials (SEP) were also monitored. The recordings were done from epidural spinal cord electrodes. Be...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/BF01410530
更新日期:1989-01-01 00:00:00
abstract:BACKGROUND:Convection-enhanced delivery (CED) is a technique allowing local infusion of therapeutic agents into the central nervous system, circumventing the blood-brain or spinal cord barrier. OBJECTIVE:To evaluate the utility of nimustine hydrochloride (ACNU) CED in controlling tumor progression in an experimental s...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-017-3123-2
更新日期:2017-05-01 00:00:00
abstract:BACKGROUND:Torcular meningioma is a rare type of brain tumor with few reports regarding the appropriate resection approach for this disease. In cases without sinus occlusion, surgeons are advised to spare the sinus; however, the sinus may interfere with the visual field. METHOD:Endoscopic supracerebellar infratentoria...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-019-03950-0
更新日期:2019-08-01 00:00:00
abstract:BACKGROUND:Hair-sparing techniques in cranial neurosurgery have gained traction in recent years and previous studies have shown no difference in infection rates, yet limited data exists evaluating the specific closure techniques utilized during hair-sparing craniotomies. Therefore, it was the intention of this study to...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-020-04239-3
更新日期:2020-04-01 00:00:00
abstract::Fifty-one cases of posterior fossa haemangioblastoma have been seen in our department over a period of 23 years. Seven cases were associated with spinal cord lesions and one with a supratentorial lesion. There were 22 cases of Lindau's disease (43%). The onset was earlier and recurrences commoner than in isolated case...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/BF02112026
更新日期:1993-01-01 00:00:00
abstract:BACKGROUND:Ventriculoatrial shunts were one of the most common treatments of hydrocephalus in pediatric and adult patients up to about 40 years ago. Thereafter, due to the widespread recognition of the severe cardiac and renal complications associated with ventriculoatrial shunts, they are almost exclusively implanted ...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-020-04675-1
更新日期:2021-02-01 00:00:00
abstract:BACKGROUND:The study was conducted to determine the causative factors in the postoperative recurrence (PR) of chronic subdural haematomas (CSDHs) and to evaluate the efficacy of surgery in adults enrolled in this trial. METHODS:99 patients with 121 CSDHs, who were operated on between January 1999 and December 2001, we...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-005-0616-1
更新日期:2005-12-01 00:00:00
abstract:BACKGROUND:Specific microanatomical characteristics of the trigeminal nerve root (TNR) blood supply and close neurovascular relationships with surrounding vessels as well as their possible clinical significance were the main reasons for this study. METHOD:The vasculature of 25 adult and four fetal TNRs were microdisse...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-010-0913-1
更新日期:2011-05-01 00:00:00
abstract:BACKGROUND:Percutaneous trigeminal nerve rhizotomy is usually performed by free-handed puncture of the foramen ovale under radiographic control with the patient kept semiconscious. The procedure has thus been reported to be highly uncomfortable for both the patient and surgeon. To our knowledge, this is the first descr...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-019-03859-8
更新日期:2019-05-01 00:00:00
abstract::We investigated the characteristic features of intramedullary spinal cord tumour associated with neurofibromatosis type 1 (NF-1). We have experienced 44 cases of pathologically confirmed intramedullary spinal cord tumour. Diagnosis of NF-1 was done according to the criteria set by the National Institute of Health Cons...
journal_title:Acta neurochirurgica
pub_type: 杂志文章,评审
doi:10.1007/BF01411560
更新日期:1997-01-01 00:00:00
abstract:BACKGROUND:Scientific research can offer the joy of discovery. For many graduating neurosurgeons, often, a seminar, class, or instructional module is their first and only formal exposure to the world of conducting research responsibly, to write down and report the results of such research. The pressure to publish scien...
journal_title:Acta neurochirurgica
pub_type: 杂志文章,评审
doi:10.1007/s00701-020-04546-9
更新日期:2021-01-01 00:00:00
abstract::A 35-year-old female presented with partial complex seizures. Computed tomography (CT) showed a slightly high density mass over the right frontal convexity, with heterogeneous contrast enhancement. T1-weighted magnetic resonance (MR) imaging showed the tumour as a hypo-intense lesion, with faint reticular enhancement ...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s007010050493
更新日期:1999-01-01 00:00:00
abstract::We investigated 76 patients with known subarachnoid haemorrhage (SAH) in order to compare the results of angiography and non-invasive Doppler recordings of cerebral artery blood velocity in the diagnosis of cerebral vasospasm. One radiologist and one neurovascular surgeon assessed angiographic spasm visually on a four...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/BF01405268
更新日期:1989-01-01 00:00:00
abstract::The prevention of cerebral vasospasm with OKY-046, an imidazole derivative and a thromboxane synthetase inhibitor, was studied co-operatively at ten neurosurgical services. Intravenous administrations of 2, 5 or 10 mu/kg/minute of OKY-046 were given continuously from the earliest possible day to the 14th SAH-day to 82...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/BF01476216
更新日期:1985-01-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to compare the effects of single and dual nerve transfer for the repair of shoulder abduction in patients with upper or upper and middle trunk root avulsion. METHODS:We carried out a retrospective analysis of 20 patients with C5-C6 or C5-C7 root avulsion treated by nerve transfe...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-019-03847-y
更新日期:2019-04-01 00:00:00
abstract::Extravasation of Onyx is a rare complication during embolization of arteriovenous malformations (AVM). We present a case of embolization that was complicated by leakage of Onyx into the cerebellum which was later encountered during surgical excision of the AVM. Our goal is to report this rare event and to outline succ...
journal_title:Acta neurochirurgica
pub_type: 杂志文章,评审
doi:10.1007/s00701-019-04199-3
更新日期:2020-04-01 00:00:00
abstract::The clinical, radiological and surgical findings of 56 patients with congenital malformations of the craniovertebral junction who underwent surgical intervention in the Department of Neurosurgery, Hacettepe University Medical School were reviewed. The anomalies were classified according to their embryonic origin. Fort...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/BF01808763
更新日期:1994-01-01 00:00:00
abstract:BACKGROUND:Intraoperative functional mapping with direct electrical stimulation during awake surgery for patients with diffuse low-grade glioma has been used in recent years to optimize the balance between surgical resection and quality of life following surgery. Mapping of executive functions is particularly challengi...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-020-04646-6
更新日期:2020-11-22 00:00:00
abstract:BACKGROUND:Many high-grade glioma (HGG) patients have cognitive impairments, which impact daily functioning. Cognitive impairments can be caused by tumour-, treatment-, and patient-related factors. The effect of the tumour and of surgical resection on cognition is, however, not well known. We investigated tumour and su...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-014-2115-8
更新日期:2014-08-01 00:00:00
abstract:BACKGROUND:This study was conducted to investigate the usefulness of intracranial cerebrospinal fluid (CSF) volume measurement using MR-based methods in the management of patients with normal pressure hydrocephalus (NPH). METHODS:The study group comprised 19 patients with NPH who showed a favorable outcome after ventr...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s007010170079
更新日期:2001-01-01 00:00:00
abstract:BACKGROUND:Cerebral vasospasm following subarachnoid haemorrhage (SAH) remains one of the major factors contributing to poor overall patient outcome. Prostaglandin F2-alpha (PGF2a) induces vasoconstriction. After SAH, PGF2a leads to cerebral inflammation and enhanced vasoconstriction, resulting in cerebral vasospasm. L...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-017-3419-2
更新日期:2018-02-01 00:00:00
abstract:OBJECT:In the past, the accuracy of surface matching has been shown to be disappointing. We aimed to determine whether this had improved over the years by assessing application accuracy of current navigation systems, using either surface matching or point-pair matching. METHODS:Eleven patients, scheduled for intracran...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/s00701-019-03867-8
更新日期:2019-05-01 00:00:00
abstract::In this study, which comprises 144 consecutive head injuries, the initial clinical assessment and the findings of the initial CT scan are related to the outcome. The mortality is related to the patient's level of consciousness and pupillary light reflex on admission. The disability rate (= number of disabled/number of...
journal_title:Acta neurochirurgica
pub_type: 杂志文章
doi:10.1007/BF01405444
更新日期:1982-01-01 00:00:00