Publications by authors named "Seier K"

Background: Pancreatic ductal adenocarcinoma (PDAC) remains a challenging disease due to its aggressiveness, late-stage diagnosis, and limited treatment options. Microsatellite instability-high (MSI-H) cancers are susceptible to immune checkpoint inhibitors. Survival outcomes for patients with MSI-H PDAC are unknown as the disease is rare.

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Background: Surgical site infections (SSIs) are a major driver of morbidity after combined liver and colorectal surgery for metastatic colorectal cancer. Available literature is inadequate to characterize risk factors and benchmarks for quality improvement.

Methods: Consecutive cases of simultaneous liver and colorectal surgery for colorectal adenocarcinoma from November 2013 through September 2022 were reviewed for SSIs per National Surgical Quality Improvement Program (NSQIP) and National Healthcare Safety Network (NHSN) criteria.

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Importance: The COVID-19 pandemic catalyzed rapid adoption of telemedicine visits for cancer care delivery. However, patients' experiences with telemedicine remain poorly understood.

Objective: To understand patients' satisfaction with telemedicine visits at a comprehensive cancer center.

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Purpose: Survival of patients with metastatic sarcoma remains poor, and there is a pressing need for new therapies. Most sarcoma subtypes are not responsive to immune checkpoint inhibition alone. Lenvatinib, a multireceptor tyrosine kinase inhibitor targeting tumor vasculature, has an immunomodulatory activity that contributes to its antitumor effects.

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Article Synopsis
  • Ampullary adenocarcinoma (AA) shows clinical and genetic diversity, and a new genomic classifier may improve patient classification beyond traditional methods, but it needs validation before being widely used.
  • A study involving 192 patients with AA assessed the accuracy of this genomic classifier against standard histology to see if it could predict survival outcomes.
  • Results indicated a 55% agreement between genomic and histological classifications; however, while histological subtypes did not predict survival, the genomic scores did correlate with survival probabilities, suggesting the genomic approach might be more effective.
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  • Improved prognostic tools are essential for patients with locally recurrent soft tissue sarcoma (STS), prompting an investigation into how the average local recurrence growth rate influences patient outcomes after resection.
  • The study analyzed data from 253 patients, revealing a 5-year cumulative incidence of disease-specific death (DSD) at 29%, with several factors like LR growth rate, age, and tumor characteristics significantly impacting outcomes.
  • Key findings outlined that faster local recurrence growth and other specific tumor traits were associated with a higher risk of DSD, highlighting the need for precise tools to assess patient prognosis effectively.
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KRAS mutations in pancreatic ductal adenocarcinoma (PDAC) are suggested to vary in oncogenicity but the implications for human patients have not been explored in depth. We examined 1,360 consecutive PDAC patients undergoing surgical resection and find that KRAS mutations are enriched in early-stage (stage I) disease, owing not to smaller tumor size but increased node-negativity. KRAS tumors are associated with decreased distant recurrence and improved survival as compared to KRAS.

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Background: Weekend surgical time is an underused asset. Concerns over a possible weekend effect (substandard care) may be a barrier.

Methods: This study examined whether a weekend effect applies to elective colorectal surgery via a single-center retrospective analysis comparing outcomes between patients who underwent elective colorectal surgery on a weekend vs a weekday.

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The delta opioid receptor (δOR or DOR) is a G protein-coupled receptor (GPCR) showing a promising profile as a drug target for nociception and analgesia. Herein, we design and synthesize new fluorescent antagonist probes with high δOR selectivity that are ideally suited for single-molecule microscopy (SMM) applications in unmodified, untagged receptors. Using our new probes, we investigated wild-type δOR localization and mobility at low physiological receptor densities for the first time.

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Objective: To assess whether selective omission of operative drains after pancreaticoduodenectomy (PD) and distal pancreatectomy (DP) is associated with adverse perioperative outcomes.

Background: The routine use of operative drains after pancreatectomy is widely practiced; however, prospective randomized clinical trials and retrospective analyses have shown mixed results.

Methods: Patients who underwent PD or DP between November 2009 and May 2021 were reviewed and stratified by operative drain placement.

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Background: Little is known on the effects of delirium onset and duration on outcome in critically ill patients with cancer.

Objectives: To determine the impact of delirium onset and duration on intensive care unit (ICU) and hospital mortality and length of stay (LOS) in patients with cancer.

Methods: Of the 915 ICU patients admitted in 2018, 371 were included for analysis after excluding for terminal disease, <24-h ICU stay, lack of active cancer and delirium.

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Article Synopsis
  • Myeloablative T cell depleted hematopoietic cell transplantation (HCT) leads to lower rates of acute and chronic graft versus host disease (GVHD) and can allow patients to respond to vaccinations post-transplant.
  • A study of 251 patients showed that 30.7% were vaccinated, with varying success rates in generating protective antibodies for diseases like hepatitis and pneumococcus.
  • Increased counts of specific T and B cell subsets may help predict which patients will have a better response to vaccinations after CD34-selected HCT, despite no significant differences noted for those who received rituximab treatment.
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Objective: To evaluate whether patient-controlled epidural analgesia (PCEA) improves postoperative pain during ambulation following elective open hepatectomy.

Background: Strategies to alleviate postoperative pain are a critical element of recovery after surgery. However, the optimal postoperative pain management strategy following open hepatectomy remains unclear.

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  • The study examined the use of telemedicine for cancer care at a major academic center in NYC before, during, and after the peak of COVID-19, focusing on breast and prostate cancer visits.
  • Telemedicine visits increased dramatically from 2% before the pandemic to 50% during peak COVID-19, and stabilized at around 30% post-peak, with differences noted across various departments and types of appointments.
  • Despite a decline in remote care in some areas post-peak, other specialties maintained or increased telemedicine use, indicating a tailored approach to care delivery that requires further investigation.
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Unlabelled: The association between immune-related AEs (irAE) and outcome in patients with sarcoma is not known. We retrospectively reviewed a cohort of patients with advanced sarcoma treated with immune checkpoint blockade (ICB)-based therapy. Association of irAEs with survival was assessed using a Cox regression model that incorporated irAE occurrence as a time-dependent covariate.

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Article Synopsis
  • The research focused on CDK4/6 inhibitors, specifically exploring how cellular senescence affects tumor growth in humans and its implications for cancer treatment.
  • A phase II clinical trial involving 30 patients with dedifferentiated liposarcoma tested the CDK4/6 inhibitor abemaciclib, demonstrating a median progression-free survival of 33 weeks and a good safety profile.
  • The study identified ANGPTL4 as a key factor in cell senescence, highlighting its role in immune response and suggesting that combining senolytics with abemaciclib could enhance treatment effectiveness in certain patients.
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Purpose: The role of locoregional therapy compared to systemic chemotherapy (SYS) for unresectable intrahepatic cholangiocarcinoma (IHC) remains controversial. The importance of hepatic disease control, either as initial or salvage therapy, is also unclear. We compared overall survival (OS) in patients treated with resection, hepatic arterial infusion pump (HAIP) chemotherapy, or SYS as it relates to hepatic recurrence or progression.

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Purpose: Enucleation is a common treatment modality performed for pediatric retinoblastoma patients, and the resultant defects are reconstructed using an ocular prosthesis. The prostheses are modified or replaced periodically, as the child develops due to orbital growth and patient-error. The purpose of this report is to evaluate the replacement frequency of prostheses in the pediatric oncologic population.

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Purpose: Although delirium is known to negatively affect critically ill patients, little data exist on delirium in critically ill patients with cancer.

Methods: We analyzed 915 critically ill patients with cancer between January and December 2018. Delirium screening was performed using the Confusion Assessment Method for the intensive care unit (ICU), performed twice daily.

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Article Synopsis
  • Patients with cancer who undergo cardiopulmonary resuscitation (CPR) have historically had low survival rates, but improvements in CPR outcomes and cancer survival mean that identifying those unlikely to survive can help guide important end-of-life discussions.
  • A study of 854 cancer patients requiring CPR found that having indicators of a declining health trajectory significantly predicted poorer hospital outcomes, with only 5 out of 249 patients with decline indicators surviving to discharge.
  • Those with indicators tended to be younger, have more advanced metastatic disease, and were more often treated in the ICU, while those without indicators had a higher rate of survival post-CPR and potential for further cancer intervention.
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Background: We aim to explore the factors related to job satisfaction among pain physicians and identify the reasons why individuals minimize or stop practicing outpatient pain medicine.

Objectives/study Design: This is a survey-based study with the primary goal to identify factors determining job satisfaction and dissatisfaction among pain medicine fellowship graduates who continue to practice and those who are no longer practicing interventional pain. A secondary goal is to elucidate reasons for anesthesiologists trained in pain medicine to leave pain medicine, despite an additional year of training, and to work as general anesthesiologists.

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The γ-aminobutyric acid type B (GABA) receptor is a prototypical family C G protein-coupled receptor (GPCR) that plays a key role in the regulation of synaptic transmission. Although growing evidence suggests that GPCR signaling in neurons might be highly organized in time and space, limited information is available about the mechanisms controlling the nanoscale organization of GABA receptors and other GPCRs on the neuronal plasma membrane. Using a combination of biochemical assays in vitro, single-particle tracking, and super-resolution microscopy, we provide evidence that the spatial organization and diffusion of GABA receptors on the plasma membrane are governed by dynamic interactions with filamin A, which tethers the receptors to sub-cortical actin filaments.

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