Jörg Klekamp

ORCID: 0000-0003-2379-7123
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About
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Research Areas
  • Spinal Dysraphism and Malformations
  • Cerebrospinal fluid and hydrocephalus
  • Spinal Fractures and Fixation Techniques
  • Spinal Cord Injury Research
  • Head and Neck Surgical Oncology
  • Spinal Hematomas and Complications
  • Spine and Intervertebral Disc Pathology
  • Neurofibromatosis and Schwannoma Cases
  • Management of metastatic bone disease
  • Congenital Anomalies and Fetal Surgery
  • Assisted Reproductive Technology and Twin Pregnancy
  • Congenital Diaphragmatic Hernia Studies
  • Fetal and Pediatric Neurological Disorders
  • Meningioma and schwannoma management
  • Bone Tumor Diagnosis and Treatments
  • Glioma Diagnosis and Treatment
  • Infectious Diseases and Tuberculosis
  • Teratomas and Epidermoid Cysts
  • Scoliosis diagnosis and treatment
  • Neurosurgical Procedures and Complications
  • Anatomy and Medical Technology
  • Sarcoma Diagnosis and Treatment
  • Medical Imaging and Analysis
  • Nerve Injury and Rehabilitation
  • Cervical and Thoracic Myelopathy

Asklepios Kliniken Bad Abbach
2025

Diabetes-Zentrum Quakenbrück
2013-2023

KRH Klinikum Nordstadt
1993-2002

Medizinische Hochschule Hannover
1987-2001

DURING THE PERIOD from 1977 to August 1992, 100 intramedullary tumors in 94 patients were operated on the Department of Neurosurgery at Nordstadt Hospital Hannover, Germany. Of these, 45% presented with associated syringes. A syrinx was more likely be found above (49%) than below (11%) tumor level. In 40%, a could identified and Ependymomas hemangioblastomas most common types Astrocytomas tended demonstrate syringes less often. Regardless histology, higher spinal level, encountered. general,...

10.1227/00006123-199411000-00010 article EN Neurosurgery 1994-11-01

10.1016/s0090-3019(99)00153-6 article EN Surgical Neurology 1999-12-01

The authors conducted a retrospective study of 107 patients treated for syringomyelia associated with arachnoid scarring between 1976 and 1995 at the Departments Neurosurgery Nordstadt Hospital in Hannover, Germany, University California Los Angeles, California. Twenty-nine have not been surgically to date because their stable neurological status. Seventy-eight progressive deficits underwent total 121 surgical procedures were followed mean period 32 (+/- 37) months. All demonstrated level...

10.3171/jns.1997.86.2.0233 article EN Journal of neurosurgery 1997-02-01

Foramen magnum decompression is widely accepted as the treatment of choice for Chiari I malformation. However, important surgical details procedure are controversial.This study analyzes 371 decompressions focusing on intraoperative findings, analysis complications, and long-term outcomes.Among 644 patients between 1985 2010, 359 underwent decompressions. Surgery symptomatic consisted suboccipital craniectomy, C1 laminectomy, arachnoid dissection, duraplasty. Short-term results were...

10.1227/neu.0b013e31825c3426 article EN Neurosurgery 2012-05-08

We have undertaken a retrospective analysis of 38 patients who were operated on for 40 meningiomas the craniocervical junction between September 1977 and August 1995 to determine which factors influenced resectability, complications, postoperative outcomes.Radiological examinations, clinical data, operation notes evaluated, additional follow-up information was obtained from outpatient telephone calls, questionnaires.Four groups could be distinguished according dural attachment as follows: 1)...

10.1097/00006123-199612000-00003 article EN Neurosurgery 1996-12-01

Surgery of intramedullary tumors is established as the treatment choice for these challenging lesions. This study presents a detailed analysis risk factors surgical morbidity and data on long-term results tumors.Among 1317 patients with spinal canal treated between 1980 2012, 278 are presented. A total 225 underwent 246 operations 250 tumors. The mean patient age was 41 ± 17 years (range 3 weeks to 83 years). Patients follow-up through outpatient visits questionnaires 53 months. Tumors were...

10.3171/2013.3.spine121063 article EN Journal of Neurosurgery Spine 2013-05-17

OBJECT Ependymomas represent the most common intramedullary tumor in adults. Despite their usually well-defined dissection plane, surgical morbidity has been documented to be considerably higher compared with other entities. This study presents an analysis of risk factors for and data on long-term results ependymomas. METHODS Among 1447 patients tumors spinal canal treated between 1980 2014, 309 presented tumors. One hundred ependymomas underwent 102 operations. Mean age was 44 ± 15 years...

10.3171/2015.5.focus15161 article EN Neurosurgical FOCUS 2015-08-01

10.1007/s007010050199 article EN Acta Neurochirurgica 1998-10-06

Object. This study was conducted to evaluate the results of shunting procedures for syringomyelia. Methods. In a follow-up analysis 42 patients in whom shunts were placed syringomyelic cavities, authors have demonstrated that 21 (50%) developed recurrent cyst expansion indicative shunt failure. Problems encountered with syringomyelia resulting from hindbrain herniation, spinal trauma, or inflammatory processes. A low-pressure cerebrospinal fluid state occurred two 18 patients; infection also...

10.3171/jns.1998.89.3.0382 article EN Journal of neurosurgery 1998-09-01

We conducted a retrospective study of 87 patients with spinal nerve sheath tumors to determine the overall clinical outcome and specific features in 20 affected neurofibromatosis Types 1 2 (NF-1 NF-2, respectively).Case records, operation notes, outpatient files, radiological examinations were analyzed for all treated between September 1977 August 1994. Additional follow-up data obtained using examinations, questionnaires, telephone calls.During period, 128 neuromas (i.e., schwannomas) 6...

10.1097/00006123-199802000-00042 article EN Neurosurgery 1998-02-01

OBJECT Chiari I malformation is the most common craniocervical malformation. Its combination with basilar invagination in a significant proportion of patients well established. This study presents surgical results for and without additional invagination. METHOD Three hundred twenty-three underwent 350 operations between 1985 2013 (mean age 43 ± 16 years, mean history symptoms 64 94 months). The clinical courses were documented score system individual neurological short-term after 3 12...

10.3171/2015.1.focus14783 article EN Neurosurgical FOCUS 2015-04-01

The treatment of tethered cord syndromes in adults is discussed regarding the natural history and surgical indications. author analyzes data obtained patients who were diagnosed with a adulthood either underwent or conservative therapy between 1991 2009.Since 1991, 2515 spinal pathologies entered into database, prospective follow-up was performed through outpatient visits questionnaires. Of patients, 85 syndrome formed basis this study. tethering effect caused by split malformation, thick...

10.3171/2011.4.spine10504 article EN Journal of Neurosurgery Spine 2011-05-20

Object This paper presents results of a prospective study for patients undergoing surgery posttraumatic syringomyelia between 1991 and 2010. Methods A group 137 with were evaluated (mean age 45 ± 13 years, mean follow-up 51 months) pre- postoperative MRI clinical examinations presenting in this period followed prospectively by outpatient visits questionnaires. Surgery was recommended symptomatic progressive course. Short-term determined within 3 months surgery, whereas long-term outcomes...

10.3171/2012.5.spine11904 article EN Journal of Neurosurgery Spine 2012-07-14

Spinal intradural arachnoid cysts are rare causes of radiculopathy or myelopathy. Treatment options include resection, fenestration, cyst drainage.To classify spinal and present results their treatment.Among 1519 patients with space occupying lesions, 130 demonstrated cysts. Neuroradiological surgical features were reviewed clinical data analyzed.Twenty-one presented as a result an inflammatory leptomeningeal reaction related to meningitis, subarachnoid hemorrhage, intrathecal injections,...

10.1093/neuros/nyx050 article EN Neurosurgery 2017-02-15

Study Design. A systematic literature review and consensus using Delphi method. Objective. The aim was to formulate recommendations regarding the natural history, diagnosis, classification optimal treatment of Os Odontoideum with global applicability. Summary background. odontoideum (OO) is a rare anomaly cranio-vertebral junction (CVJ). Due paucity literature, there still considerable debate about clinical management OO. Material Method. Using PubMed, authors reviewed on OO published from...

10.1097/brs.0000000000005277 article EN Spine 2025-01-29

Study Design. A systematic literature review and consensus using Delphi method. Objective. This aims to outline the therapeutic criteria clarify best surgical options for different types of basilar invagination (BI). Summary Background. BI is a complex developmental malformation which many remedies have been proposed without clear consensus. Material Methods. Using PubMed, authors reviewed on treatment published from 2011 2022 looking at options. panel spine surgeons members WFNS Spine...

10.1097/brs.0000000000005282 article EN Spine 2025-01-31

Study Design. Systematic review plus expert opinion framed on Delphi Method. Objective. Define criteria to (i) how screen for instability of cranio-vertebral CVJ in a high-risk population, especially Down or Morquio syndrome, (ii) if when which surgical procedure is indicated and (iii) whether syndromic patients can safely participate sports activities. Summary Background Data. Syndromic abnormalities may lead potentially devastating neurological deficits. As now, there no international...

10.1097/brs.0000000000005291 article EN Spine 2025-02-10

Study Design. A systematic literature review and consensus using Delphi method. Objective. This aims to provide an overview on Chiari malformation in pediatric patients, highlighting the specific clinical manifestations surgical treatment options. Summary of Background. children presents a real difficulty general neurosurgeon because are not smaller adults. In absence neurosurgeons, as many countries world, need for education neurosurgeons management was identified. Material Methods. The...

10.1097/brs.0000000000005290 article EN Spine 2025-02-10

Study Design. Systematic literature review plus expert opinion framed on Delphi method. Objective. To analyze the influence of coexistent Chiari I Malformation (CMI) management Basilar Invagination (BI). Summary Background Data. (BI) and 1 constitute commonest anomalies cranio-vertebral junction (CVJ). Treatment becomes even more challenging for patients in whom both pathologies co-exist. Method. Using PubMed, authors identified 48 publications published between 2011 2022 concerning...

10.1097/brs.0000000000005293 article EN Spine 2025-02-10

Disturbances of cerebrospinal fluid (CSF) flow are the commonest cause syringomyelia. Spinal arachnopathies may lead to CSF obstructions but difficult diagnose. Consequently, associated syringomyelias often categorized as idiopathic.To present and analyze diagnosis long-term outcomes in an observational study patients with nontraumatic from 1991 2011.A total of288 (mean age, 47 ± 15 years; follow-up, 54 46 months) were evaluated. Decompression arachnolysis, untethering, duraplasty for...

10.1227/neu.0b013e31827fcc8f article EN Neurosurgery 2012-12-04
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