Publications by authors named "Krieg S"

Background And Objectives: Recently, reduction of transcallosal inhibition by contralateral navigated repetitive transcranial magnetic stimulation (nrTMS) improved neurorehabilitation of glioma patients with new postoperative paresis. This multicentric study examines the effect of postoperative nrTMS in brain tumor patients to treat surgery-related upper extremity paresis.

Methods: This is a secondary analysis of two randomized and three one-arm studies in brain tumor patients with new/progressive postoperative paresis.

View Article and Find Full Text PDF

Background: Reliable language mappings require sufficient language skills. This study evaluated whether linguistic task properties impact feasibility and reliability of navigated transcranial magnetic stimulation (nTMS)-based language mappings in aphasic glioma patients.

Methods: The effect of linguistic complexity on naming accuracy during baseline testing without stimulation and on the number of errors during nTMS was evaluated for 16 moderately and 4 severely expressive aphasic patients.

View Article and Find Full Text PDF

Background: This study aims to evaluate the current rates and outcomes of minimally invasive versus open surgery for colonic diverticular disease in Germany, using a nationwide dataset.

Methods: We analyzed data from 36 hospitals, encompassing approximately 1.25 million hospitalizations from 1 January 2019 to 31 December 2023.

View Article and Find Full Text PDF

Deepening our understanding of neuro-cancer interactions can innovate brain tumor treatment. This mini review unfolds the most relevant and recent insights into the neural mechanisms contributing to brain tumor initiation, progression, and resistance, including synaptic connections between neurons and cancer cells, paracrine neuro-cancer signaling, and cancer cells' intrinsic neural properties. We explain the basic and clinical-translational relevance of these findings, identify unresolved questions and particularly interesting future research avenues, such as central nervous system neuro-immunooncology, and discuss the potential transferability to extracranial cancers.

View Article and Find Full Text PDF

Background: Discharge against medical advice (DAMA) disrupts continuity of care and is associated with increased readmission rates, morbidity, and mortality. While extensively studied in general hospital populations, its prevalence and associated factors in cancer patients, where treatment adherence is critical for outcomes, remain underexplored.

Methods: This multicenter, cross-sectional study analyzed anonymized data from the IQVIA hospital database, including cancer patients hospitalized in 36 German hospitals between January 2019 and December 2023.

View Article and Find Full Text PDF

Postoperative fever following neuroendoscopic procedures has been well-documented, yet specific differentiation based on the nature and site of the procedure remains lacking. Given the anatomical involvement of the hypothalamus in temperature regulation, we propose that endoscopic third ventriculostomy (ETV) may have a distinct impact on postoperative fever. This study aims to investigate this phenomenon.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates the effectiveness of a surgical procedure (extended strip craniectomy with bilateral barrel staving) for treating isolated craniosynostosis of the sagittal suture in infants, specifically focusing on its impact on cranial shape without directly addressing forehead issues.
  • Results showed significant improvements in aspects like bossing angle and cephalic index over a year, although the cranial shape did not entirely match that of healthy peers, indicating partial normalization but not complete correction.
  • The research validates 3D photogrammetry as a useful noninvasive tool for assessing cranial changes post-surgery, suggesting potential for wider clinical applications in monitoring cranial morphology.
View Article and Find Full Text PDF
Article Synopsis
  • The study examines the role of low-pathogenic bacteria from removed spinal implants and evaluates the effectiveness of single-dose antibiotics before surgery.
  • A retrospective analysis of 93 patients found that bacterial presence in loosened implants (41%) was not significantly different from non-loosened ones (27%), highlighting a possible link between bacterial resistance and antibiotic choice.
  • The results indicate a need for reevaluating current antibiotic prophylaxis due to the prevalence of both sensitive and resistant bacteria, emphasizing the importance of further research on low-virulence bacteria in non-loosened implants.
View Article and Find Full Text PDF

Introduction: Tumorous growths in the sellar region pose significant clinical challenges due to their proximity to critical visual structures such as the optic chiasm and optic nerves. Given their proximity to the optic system, these tumors are often diagnosed due to a progressive decrease in visual acuity. Thus, surgical intervention is crucial to prevent irreversible damage, as timely decompression can halt the progression of edema and subsequent optic atrophy.

View Article and Find Full Text PDF

Background: Awake craniotomy (AC) is a technique that balances maximum resection and minimal postoperative deficits in patients with intracranial tumors. To aid in the comparability of functional outcomes after awake surgery, this study investigated its international practice and aimed to define categories of postoperative deficits.

Methods: A survey was distributed via neurosurgical networks in Europe (European Association of Neurosurgical Societies, EANS), the Netherlands (Nederlandse Vereniging voor Neurochirurgie, NVVN), Belgium (Belgian Society of Neurosurgery, BSN), and the United States (Congress of Neurological Surgeons, CNS) between April 2022 and April 2023.

View Article and Find Full Text PDF
Article Synopsis
  • Pediatric intracranial tumors at the skull base are rare, challenging to treat due to complex anatomy, and lack substantial clinical evidence, prompting a study on surgical approaches and outcomes.
  • The study involved 12 children under 18 who underwent skull base surgery from 2017 to 2023, analyzing demographics, tumor details, surgical methods, and survival rates.
  • Results indicated a predominance of female patients, varying tumor locations and types, with 58.3% achieving gross or near-total resection; however, 33.3% of patients died from tumor progression within an average of 15 months.
View Article and Find Full Text PDF

Purpose: Anal fissures and anorectal fistulas are diseases often associated with significant pain and prolonged discomfort, resulting in a significantly reduced quality of life (QoL). They are not only a surgical problem but also have a profound psychosocial impact and influence on QoL. The aim of this study was to investigate the incidence of depression in patients with these pathologies and to highlight the need to address the psychosocial aspects of these diseases.

View Article and Find Full Text PDF

Introduction: Neuroendoscopy has become a well-established procedure for treating various intracranial conditions.

Research Question: We evaluated the advantages of that technique, with focus on adverse events.

Material And Methods: Retrospective analysis included all patients who underwent neuroendoscopic procedures between January 2017 and December 2023.

View Article and Find Full Text PDF

Introduction: Neuromodulation through deep brain stimulation (DBS) and spinal cord stimulation (SCS) has become a successful therapy for various neurological disorders, such as movement disorders and chronic pain. Implantable pulse generators (IPGs) are pivotal in these therapies, available as either rechargeable (r-IPGs) or non-rechargeable (nr-IPGs).

Research Question: To perform a meta-analysis on r-IPGs.

View Article and Find Full Text PDF

Subgroup analyses are essential to generate new hypotheses or to estimate treatment effects in clinically meaningful subgroups of patients. They play an important role in taking the next step towards personalized surgical treatment for brain tumor patients. However, subgroup analyses must be used with consideration and care because they have significant potential risks.

View Article and Find Full Text PDF
Article Synopsis
  • This study investigates the relationship between motor deficits (MD) in patients after glioma surgery and the proximity of the tumor to key motor pathways, specifically the corticospinal tract (CST).
  • It compares two imaging techniques—conventional Diffusion Tensor Imaging Fiber Tracking (DTI-FT) and q-ball Imaging Fiber Tracking (QBI-FT)—to determine which better predicts postoperative motor impairment.
  • Preliminary results indicate that patients with more severe MD have lesions significantly closer to the CST when analyzed using QBI-FT, suggesting this method could improve neurosurgical planning, although more extensive research is needed to validate these findings.
View Article and Find Full Text PDF

: Primary aldosteronism (PA) is a common cause of endocrine hypertension, characterized by excessive aldosterone secretion leading to hypertension, hypokalemia, and metabolic alkalosis. While historically diagnosed based on this classic triad of symptoms, current understanding reveals a more nuanced presentation. This study aimed to investigate the prevalence of PA-associated diseases in a large German population.

View Article and Find Full Text PDF

Background: Accurate intraoperative tissue diagnostics could impact on decision making regarding the extent of resection (EOR) during brain tumor surgery. Stimulated Raman histology (SRH) is a label-free optical imaging method that uses different biochemical properties of tissue to generate a hematoxylin-eosin-like image and, in combination with an artificial intelligence-based image classifier, offers the opportunity to obtain rapid intraoperative tissue diagnoses.

Objective: The goal of this study was to report on our initial experience with SRH to evaluate its accuracy in comparison to final tissue diagnosis.

View Article and Find Full Text PDF

Purpose: Previous evidence suggests that glioma re-resection can be effective in improving clinical outcomes. Furthermore, the use of mapping techniques during surgery has proven beneficial for newly diagnosed glioma patients. However, the effects of these mapping techniques during re-resection are not clear.

View Article and Find Full Text PDF

Background: Homozygous deletions of CDKN2A/B are known to predict poor prognosis in gliomas, but the impact of hemizygous deletions is less clear. This study aimed to evaluate the prognostic significance of hemizygous CDKN2A/B deletions in IDH-mutant low-grade astrocytomas and oligodendrogliomas.

Methods: Tissue samples diagnosed as astrocytoma, IDH-mutant and oligodendroglioma, IDH-mutant, 1p/19q co-deleted CNS WHO grade 2 and 3 were collected from the archives of the Institute of Neuropathology in Heidelberg.

View Article and Find Full Text PDF
Article Synopsis
  • Computational neurosurgery combines artificial intelligence and computational modeling to enhance the diagnosis and treatment of neurosurgical conditions, aiming to advance clinical neurosciences.
  • The field seeks to integrate ethical considerations to ensure that the use of AI is conducted responsibly and prioritizes patient care, ultimately aiming to prevent errors in treatment.
  • This initiative serves as a guide for practitioners, ethicists, and scientists in the application of ethical standards within computational neurosurgery.
View Article and Find Full Text PDF

Objective: ProGAV and ProGAV2.0 adjustable valves are extensively used for treating hydrocephalus in pediatric patients. This study aims to conduct a comprehensive comparison between these two valves concerning their survival and complication rates.

View Article and Find Full Text PDF

Biologics are a cornerstone in the treatment of severe cases of inflammatory bowel disease (IBD) and aim to control the disease and improve quality of life. This study investigated changes in nonbiologic medication prescriptions for IBD patients initiating biologic therapy in Germany. This study used data from anonymized pharmacy records in the German longitudinal prescription (LRx) database and included biologic-naive IBD patients who received their first biologic therapy prescription between 2016 and 2022.

View Article and Find Full Text PDF

Radioiodine (RAI) therapy after surgery, is an important component for the treatment of patients with papillary thyroid cancer (PTC), the most common thyroid cancer. In this study we sought to evaluate the cancer-specific survival (CSS) impact of RAI in specific thyroid cancer subgroups. The Surveillance, Epidemiology, and End Results (SEER) database were used to identify patients with PTC who underwent surgery between 2000 and 2019.

View Article and Find Full Text PDF

Both the transfrontal and the suboccipital-transcerebellar approach are frequently used trajectories for frame-based stereotactic biopsies of brainstem lesions. Nevertheless, it remains unclear which approach is more favorable in terms of complications, diagnostic success and outcome, especially considering the location of the lesion within the brainstem. This study compared the safety and diagnostic yield of these two approaches.

View Article and Find Full Text PDF