Publications by authors named "Joshua Tseng"

Biliary dyskinesia refers to a group of functional and motility disorders of the biliary system in patients presenting with typical biliary pain, but without any visible structural abnormalities on standard imaging. The Rome IV Criteria establishes diagnostic criteria for functional gallbladder disorder (gallbladder dyskinesia and biliary hyperkinesia), functional biliary sphincter of Oddi disorder (biliary dyskinesia), and pancreatic sphincter of Oddi disorder. Many diagnostic adjuncts such as hepatobiliary scintigraphy and sphincter of Oddi manometry exist, although these results are supportive and not necessarily diagnostic for biliary dyskinesia.

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Background: Increased screening and treatment advancements have resulted in improved survival rates in women with breast cancer (BC). However, recent data suggests these women have elevated risk of developing a second primary malignancy (SPM) compared to the general population. Limited data exists on factors associated with BC patients developing a SPM.

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Patients with gastroenteropancreatic (GEP) neuroendocrine tumors (NET) often present with advanced disease. Primary tumor resection (PTR) in the setting of unresectable metastatic disease is controversial. Most studies evaluating the impact of PTR on overall survival (OS) have been performed using large population-based databases, with limited treatment related data.

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Introduction: During gastric cancer resection, back table dissection (BTD) involves examination and separation of lymph node (LN) packets from the surgical specimen based on LN stations, which are sent to pathology as separately labeled specimens. With potential impact on clinical outcomes, we aimed to explore how BTD affects number of LNs examined.

Methods: A retrospective review of a gastric cancer database was performed, including all cases of gastrectomy with D2 lymphadenectomy from January 2009 to March 2022.

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Article Synopsis
  • Nipple sparing mastectomy (NSM) is a common procedure for breast cancer patients, but the best way to monitor patients afterward remains unclear.
  • A study involving 399 patients from 2007 to 2021 compared those followed by clinical breast exams (CBE) alone to those who also had MRI surveillance, analyzing recurrence rates and survival outcomes.
  • Results indicated that while MRI follow-up led to more biopsies, there was no significant difference in overall survival rates between the two groups, suggesting that CBE may be sufficient for postoperative monitoring.
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  • The study focused on older women (70+) with early-stage estrogen receptor-positive invasive breast cancer and the potential for overtreatment, assessing the omission of sentinel lymph node biopsy and radiotherapy post-breast-conserving surgery.
  • Analysis of 881 patients revealed that the use of radiotherapy significantly decreased for low-risk patients from 58% in 2012 to 36% in 2022, while high-risk patients maintained stable treatment rates.
  • Results indicated appropriate de-escalation of treatment for low-risk invasive breast cancer cases, showing that factors like age and tumor characteristics impacted treatment decisions.
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Background: The Commission on Cancer (CoC) established quality measures to be reported in National Cancer Database (NCDB) Quality Reporting Tools. Compliance is provided to accredited cancer programs as Cancer Program Practice Profile Reports (CP3R). At the time of this study, the quality metric for gastric cancer (GC) was removal and pathologic examination of 15 regional lymph nodes for resected GC (G15RLN).

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Background: Receptor tyrosine kinase-like orphan receptor 2 (ROR2) is a transmembrane receptor that has a complex role in cancer, acting either to promote or inhibit tumor progression in different tumor types. The effect of ROR2 on gastric cancer is unclear.

Methods: Immunohistochemistry was used to investigate the role of ROR2 in the prognosis of gastric cancer.

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Introduction: There is limited data correlating preoperative mobility limitations with clinical outcomes in bariatric patients. This study uses propensity score matching (PSM) to compare 30-day outcomes between patients with preoperative limited mobility (LM) versus patients without (non-LM).

Methods: Using the 2016-2018 Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) database, patients undergoing primary laparoscopic sleeve gastrectomy or gastric bypass were identified.

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Background: Surgical resection with negative margins is the treatment of choice for adrenocortical carcinoma (ACC). This study was undertaken to determine factors associated with negative resection margins.

Methods: National Cancer Database was queried from 2010 to 2016 to identify patients with AJCC/ENSAT Stage I-III ACC who underwent adrenalectomy.

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The majority of online video contents remain inaccessible to people with visual impairments due to the lack of audio descriptions to depict the video scenes. Content creators have traditionally relied on professionals to author audio descriptions, but their service is costly and not readily-available. We investigate the feasibility of creating more cost-effective audio descriptions that are also of high quality by involving novices.

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Background: Nonalcoholic steatohepatitis (NASH) is common in patients with obesity. Liver biopsy (LB) can be routinely or selectively performed during bariatric surgery to identify patients with NASH.

Methods: Patients undergoing bariatric surgery between 2016 and 2020 at our institution were identified.

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Background: Adrenocortical carcinoma (ACC) staging does not account for the number of positive nodes. The prognostic value of quantitative metastatic nodal burden is unknown.

Methods: The National Cancer Database was retrospectively queried from 2004-2016 to identify patients with Stage I-III ACC undergoing adrenalectomy.

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Article Synopsis
  • Phyllodes tumors (PT) are rare tumors classified as benign, borderline, or malignant, with the study involving 76 patients diagnosed between 2009 and 2019.
  • Among the patients, 61.8% had benign PT, 11.8% had borderline, and 26.3% had malignant, with a mean age of 52 at diagnosis.
  • Surgical treatments varied: benign PT often received excisional biopsy, while malignant PT frequently underwent lumpectomy or mastectomy; recurrence rates were low, but positive margins were linked to higher recurrence.
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  • The study evaluates national compliance with the Cancer Program Practice Profile Reports (CP3R) metrics, focusing on the use of combination chemotherapy or chemo-immunotherapy for certain breast cancer patients within 120 days of diagnosis.
  • An analysis of data from the National Cancer Database shows an increase in treatment concordance from 75.7% in 2004 to 89.5% in 2014, with better overall survival for patients receiving recommended treatments.
  • Patients treated at academic hospitals and those with private insurance experienced greater survival benefits, highlighting the importance of accessibility to high-quality care.
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  • Fibroepithelial lesions of the breast (FEL) include a range of tumors such as fibroadenomas and phyllodes tumors, which can be challenging to distinguish in core needle biopsies.
  • A study of 305 patients from 2009 to 2019 found that 25.8% of cases upgraded to phyllodes tumors after excision, with factors like age over 50, larger size, and specific histological features increasing upgrade risk.
  • The results suggest excising FEL is generally recommended, but monitoring smaller tumors may be a safe option for some patients.
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Background: The burden of gastric cancer involving Hispanic patients in the United States is growing as both the population and the incidence of gastric cancer in this group increases. This burden is compounded by presentation with advanced disease and socioeconomic challenges shaping cancer care. We sought to describe the demographics, socioeconomic factors, treatment, and survival experience of Hispanic patients with gastric adenocarcinoma.

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Introduction: Surgery is the initial treatment of choice for patients with resectable adrenocortical carcinoma (ACC). We sought to determine factors associated with non-operative management of resectable ACC.

Methods: 2004-2016 National Cancer Database (NCDB) was queried to identify patients with AJCC/ENSAT Stage I-III ACC.

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  • The Commission on Cancer (CoC) creates Cancer Program Practice Profile Reports (CP3R) that establish quality care standards, focusing on three breast cancer metrics: radiation treatment after surgeries and hormonal therapy for certain breast cancer stages.
  • A study analyzing the National Cancer Database from 2004 to 2014 showed that a significant percentage of patients met these metrics, with 91.1% for BCSRT, 88.4% for MASTRT, and 90.7% for HT in 2014; however, compliance rates were lower in community hospitals compared to Integrated Network Cancer Programs (INCPs).
  • Despite increased compliance rates aligning with CoC standards, particularly in comprehensive cancer programs, MASTRT
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The American College of Surgeons Oncology Group Z0011 (ACOSOG Z0011) trial demonstrated no survival advantage for women with clinical T1-T2 invasive breast cancer with 1-2 positive sentinel lymph nodes (SLN) who received whole-breast radiation, and no further axillary surgery when compared to women who did undergo axillary lymph node dissection (ALND). We used the National Cancer Database (NCDB) to study changes in utilization of ALND after the publication of this trial. NCDB was queried for female patients from 2012 to 2015 who met Z0011 criteria.

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Surgeons are often unfamiliar with the costs of surgical instrumentation and supplies. We hypothesized that surgeon cost feedback would be associated with a reduction in cost. A multidisciplinary team evaluated surgical supply costs for laparoscopic appendectomies of 7 surgeons (surgeons A-G) at a single-center academic institution.

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Background: Mastectomy rates continue to increase in women diagnosed with breast cancer (BC). There are limited data regarding reconstruction rates at academic centers (AC) versus community hospitals (CH). We aim to determine the effect of facility type on reconstruction rates.

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Background: The American College of Surgeons Oncology Group (ACOSOG) Z1071 and Sentinel Neoadjuvant (SENTINA) trials of sentinel node biopsy for node-positive breast cancer treated with neoadjuvant chemotherapy (NAC) demonstrated false-negative rates that varied on the basis of surgical technique. This study evaluated trends in axillary operations before and after publication of these trials.

Methods: This study analyzed patients from National Cancer Database (NCDB) with clinical T0 through T4, N1 and N2, M0 breast cancer who received NAC from 1 January 2012 to 31 December 2015 and sentinel lymph node biopsy (SNB) or axillary lymph node dissection (ALND).

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Charge markups for health care are variable and inflated several times beyond cost. Using the 2015 Medicare Provider Fee-For-Service Utilization and Payment Data file, we identified providers who billed for critical care hours and related procedures, including CPR, EKG interpretation, central line placement, arterial line placement, chest tube/thoracentesis, and emergent endotracheal intubation. Markup ratios (MRs), defined as the amount charged divided by the amount allowable, were calculated and compared; 42.

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Background: Negative appendectomy rates (NAR) historically ranged from 15 to 25%, but have decreased recently.

Methods: Using the 2016 ACS-NSQIP database, we identified patients who underwent appendectomies for appendicitis. Patients with and without appendicitis on pathology were compared.

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