Publications by authors named "Dan G Blazer"

As the numbers of older adults continue to increase globally, the need for facilitating healthy aging has become critical. While a physically healthy lifestyle, including exercise and diet, is important, recent research has highlighted a major impact of psychosocial determinants of health, such as resilience, wisdom, positive social connections, and mental well-being, on whole health. This article focuses on keeping the mind and brain healthy with psychosocially active aging.

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Article Synopsis
  • The study focuses on pancreatic acinar cell carcinoma (pACC), a rare type of pancreatic cancer, highlighting its clinical characteristics, genetic mutations, and patient survival outcomes.
  • A total of 61 patients who underwent surgery between 1999 and 2022 were analyzed, showing a median overall survival of 73 months and a recurrence-free survival of 22 months; those with oligometastatic disease had even better outcomes.
  • Significant genetic findings included mutations in core genes related to DNA repair pathways in 26% of patients, indicating potential avenues for targeted treatment.
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  • Desmoid tumors (DTs) are uncommon, non-metastasizing growths that can behave aggressively locally, with a shift in management from traditional surgery to active surveillance.
  • A review of 103 patients showed a significant decrease in surgical resection rates over time, indicating a preference for monitoring rather than immediate intervention.
  • The study highlights improved treatment-free survival for those under active surveillance, aligning with updated guidelines from expert panels advocating for this approach.
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Background: The Centers for Medicare and Medicaid Services (CMS) price transparency rule tries to facilitate cost-conscious decision-making. For surgical services, such as pancreaticoduodenectomy (PD), factors mediating transparency and real-world reimbursement are not well described.

Methods: The Leapfrog Survey was used to identify United States hospitals performing PD.

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  • Dermatofibrosarcoma protuberans (DFSP) is a rare skin cancer that has an infiltrative growth pattern, making surgical removal challenging; limited data exists on its management and outcomes.
  • A study analyzed data from 347 adult DFSP patients who underwent surgery across multiple institutions, finding that most presented with symptoms and that R0 resection (no cancerous cells at the margins) was achieved in 89.5% after multiple attempts.
  • Results showed a 98.8% disease-specific survival rate with recurrence being relatively low, highlighting the effectiveness of surgery but indicating the need for careful margin assessment and techniques due to the tumor's aggressive nature.
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Background: Liver transplantation (LT) has been shown to be superior to resection in highly selected patients with perihilar cholangiocarcinoma (CCA), yet has traditionally been contraindicated for intrahepatic CCA (iCCA). Herein, we aimed to examine contemporary trends and outcomes for surgical resection and LT for iCCA.

Methods: The National Cancer Database was queried for patients presenting with stage I-III iCCA between 2010 and 2018 who underwent resection or LT.

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Introduction: Primary vascular leiomyosarcomas are incredibly rare and have a poor prognosis. The purpose of this study was to analyze the surgical outcomes of patients with primary inferior vena cava (IVC) leiomyosarcoma.

Methods: We performed a retrospective review of IVC leiomyosarcoma resections performed at a single tertiary care hospital from 2014 to 2023.

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Robotic pancreaticoduodenectomy (RPD) has a learning curve of approximately 30-250 cases to reach proficiency. The learning curve for laparoscopic pancreaticoduodenectomy (LPD) at Duke University was previously defined as 50 cases. This study describes the RPD learning curve for a single surgeon following experience with LPD.

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Background: Radical cholecystectomy is recommended for T1B and greater gallbladder cancer, however, there are conflicting reports on the utility of extended resection for T1B disease. Herein, we characterize outcomes following simple and radical cholecystectomy for pathologic stage T1B gallbladder cancer.

Methods: The National Cancer Database (NCDB) was queried for patients with pathologic T1B gallbladder cancer diagnosed from 2004 to 2018.

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Objectives: We performed a retrospective analysis within a national cancer registry on outcomes following resection or ablation for intrahepatic cholangiocarcinoma (iCCA).

Methods: The National Cancer Database was queried for patients with clinical stage I-III iCCA diagnosed during 2010-2018, who underwent resection or ablation. Overall survival (OS) was compared with Kaplan-Meier and multivariable Cox proportional hazards methods.

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Background: Hepatectomy is the cornerstone of curative-intent treatment for intrahepatic cholangiocarcinoma (ICC). However, in patients unable to be resected, data comparing efficacy of alternatives including thermal ablation and radiation therapy (RT) remain limited. Herein, we compared survival between resection and other liver-directed therapies for small ICC within a national cancer registry.

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Background: Society guidelines remain inconsistent on the role of endoscopic and radiographic surveillance as an alternative to surgical resection of small gastric gastrointestinal stromal tumors (GISTs). Herein, we aimed to assess survival among patients with gastric GISTs undergoing observation versus surgical resection, stratified by tumor size.

Methods: The National Cancer Database (NCDB) was queried for gastric GISTs < 2 cm diagnosed from 2010-2017.

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Background: Despite institutional perioperative bundles and national infection prevention guidelines, surgical site infection (SSI) after a major abdominal operation remains a significant source of morbidity. Negative pressure therapy (NPT) has revolutionized care for open wounds but the role of closed incision NPT (ciNPT) remains unclear.

Study Design: We conducted a multi-institutional randomized controlled trial evaluating SSI after major elective colorectal or hepatopancreatobiliary surgery (Clinical Trial Registration: NCT01905397).

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Pancreatic myoepithelial hamartoma is a rare, benign solid and cystic lesion of the pancreas. We present the first case of an adult with a giant myoepithelial hamartoma extending throughout the pancreas in a patient with diabetes in 4 immediate family members. The patient is a 46-year-old man presented with recurrent acute pancreatitis.

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Background: National cancer registries are valuable tools to analyze patterns of care and clinical outcomes; yet, missing data may impact the accuracy and generalizability of these data. We sought to evaluate the association between missing data and overall survival (OS).

Methods: Using the NCDB (National Cancer Database) and SEER (Surveillance, Epidemiology, End Results Program), we assessed data missingness among patients diagnosed with invasive breast cancer from 2010 to 2014.

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Article Synopsis
  • This study investigates how body composition, tumor characteristics, and patient features from CT scans can influence treatment strategies and outcomes in patients with gastroesophageal adenocarcinoma.
  • Data from 142 patients who received neoadjuvant treatment were analyzed, and findings showed that factors like skeletal muscle area and body mass index significantly impacted treatment tolerance and survival rates.
  • The research suggests that evaluating body composition through CT scans could help predict treatment complications and survival, enhancing treatment planning for affected patients.
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The world's population is aging, bringing about an ever-greater burden of mental disorders in older adults. Given multimorbidities, the mental health care of these people and their family caregivers is labor-intensive. At the same time, ageism is a big problem for older people, with and without mental disorders.

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