Publications by authors named "Reza Mehran"

Objective: The benefits of pulmonary resection as local consolidative therapy for stage IV non-small cell lung cancer (NSCLC) have been clearly demonstrated in appropriate patients. For early-stage disease, debate continues regarding the role of anatomic versus parenchymal-sparing resection. We explored the impact of resection extent on outcomes for stage IV NSCLC.

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Background: Medicaid expansion reduced the uninsured rate in non-small cell lung cancer (NSCLC) patients. We aimed to determine whether Medicaid expansion was associated with regionalization of surgical care at high-volume hospitals and timely treatment for early-stage NSCLC patients.

Methods: Using the National Cancer Database, adults aged 40-64 years with resected stage I-II NSCLC between 2010 and 2016 were identified.

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Rosai-Dorfman disease is a non-Langerhans cell histiocytosis with ubiquitous distribution. Although more common in lymph nodes, it has been described in many organ systems. The current case depicts a 54-year-old woman with a history of estrogen receptor-positive breast carcinoma who showed different image features of metastatic lymph nodes and splenic Rosai-Dorfman disease on FDG and FES PET/CT scans.

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Background: Financial toxicity (FT) refers to the financial stress and detrimental impact on quality of life experienced by patients due to treatment cost. In patients with resected lung cancer (LC), we sought to identify those at risk of developing moderate or severe ("major") FT using machine learning (ML) techniques based on preoperative characteristics.

Study Design: Patients who underwent LC resection at a single center between January 2016 and December 2021 were surveyed to ascertain demographic information, financial data, and presence of major FT.

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Imaging-based spatial transcriptomics (ST) is evolving rapidly as a pivotal technology in studying the biology of tumors and their associated microenvironments. However, the strengths of the commercially available ST platforms in studying spatial biology have not been systematically evaluated using rigorously controlled experiments. In this study, we used serial 5-μm sections of formalin-fixed, paraffin-embedded surgically resected lung adenocarcinoma and pleural mesothelioma tumor samples in tissue microarrays to compare the performance of the single cell ST platforms CosMx, MERFISH, and Xenium (uni/multi-modal) platforms in reference to bulk RNA sequencing, multiplex immunofluorescence, GeoMx Digital Spatial Profiler, and hematoxylin and eosin staining data for the same samples.

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Imaging-based spatial transcriptomics (ST) is evolving rapidly as a pivotal technology in studying the biology of tumors and their associated microenvironments. However, the strengths of the commercially available ST platforms in studying spatial biology have not been systematically evaluated using rigorously controlled experiments. In this study, we used serial 5-m sections of formalin-fixed, paraffin-embedded surgically resected lung adenocarcinoma and pleural mesothelioma tumor samples in tissue microarrays to compare the performance of the single cell ST platforms CosMx, MERFISH, and Xenium (uni/multi-modal) platforms in reference to bulk RNA sequencing, multiplex immunofluorescence, GeoMx Digital Spatial Profiler, and hematoxylin and eosin staining data for the same samples.

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Background And Objectives: Randomized clinical trials have shown that sub-lobar resection for clinical stage (cStage) IA non-small cell lung cancer (NSCLC) is non-inferior to lobar resection. We evaluated traditional and conditional survival differences between lobectomy, wedge resection, and segmentectomy in patients with cStage IA NSCLC.

Methods: The National Cancer Database (2004-2019) was queried for patients with cStage IA (≤ 2 cm) NSCLC who underwent upfront lobectomy, segmentectomy, or wedge resection.

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Background: Neoadjuvant immune checkpoint inhibitors (ICIs) have improved survival outcomes compared with chemotherapy in resectable non-small cell lung cancer (NSCLC). However, the impact of actionable genomic alterations (AGAs) on the efficacy of neoadjuvant ICIs remains unclear. We report the influence of AGAs on treatment failure (TF) in patients with resectable NSCLC treated with neoadjuvant ICIs.

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Introduction: Minimally invasive surgery (MIS) reduces lengths of stay, complications, and potentially perioperative hospital costs. However, the impact of MIS on financial toxicity (FT), defined as the costs resulting from oncologic care and their negative effects on quality of life, in patients with lung cancer is unknown. Our objective was to investigate the association between surgical approach and FT in this population.

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Background: In advanced osteosarcoma, the lung is the most frequent site of distant metastasis, with metastasectomy often used for local disease control. The influence of pulmonary resection margin length on outcomes for osteosarcoma has not been well explored. This study sought to evaluate the impact of margin length relative to tumor size on local recurrence and survival in lung-limited metastatic osteosarcoma.

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Efforts to improve the prognosis for patients with locally advanced esophageal or gastroesophageal junction (GEJ) adenocarcinoma have focused on neoadjuvant approaches to increase the pathological complete response (pathCR) rate, improve surgical resection, and prolong event-free and overall survival (OS). Building on the recent evidence that PD-1 inhibition plus chemotherapy improves the OS of patients with metastatic GEJ adenocarcinoma, we evaluated whether the application of this strategy in the neoadjuvant setting would improve the pathological response. This single-center phase I/II trial evaluated the safety, toxicity, and efficacy of neoadjuvant atezolizumab with oxaliplatin and 5-fluorouracil (modified FOLFOX) followed by esophagectomy followed by atezolizumab.

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Objective: To investigate overall survival and length of stay (LOS) associated with differing management for high output (>1 L over 24 hours) leaks (HOCL) after cancer-related esophagectomy.

Background: Although infrequent, chyle leak after esophagectomy is an event that can lead to significant perioperative sequelae. Low-volume leaks appear to respond to nonoperative measures, whereas HOCLs often require invasive therapeutic interventions.

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The use of octreotide in managing intrathoracic chyle leak following esophagectomy has gained popularity in the adult population. While the benefits of octreotide have been confirmed in the pediatric population, there remains limited evidence to support its use in the adults post-esophagectomy. Thus, we performed a single-institution cohort study to characterize its efficacy.

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Objectives: Pulmonary hypertension (PH) is an important physiologic variable in the assessment of patients undergoing major thoracic operations but all too often neglected because of the need for right heart catheterization (RHC) due to the inaccuracy of transthoracic echocardiography. Patients with lung cancer often require endobronchial ultrasound (EBUS) as part of the staging of the cancer. We sought to investigate whether EBUS can be used to screen these patients for PH.

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Background: Therapeutic decisions in non-small cell lung cancer (NSCLC) are stage-dependent, and, consequently, changes in an individual's stage carry potential for substantial alterations in management. Malignancy-related disturbances of the circulomic inflammatory environment may affect platelets quantitatively, ultimately leading to changes in tumor characteristics. Our objective was to identify circulomic characteristics associated with upstaging among chemotherapy-naïve patients with resected NSCLC and to assess the consequent impact on overall survival (OS).

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Background And Objectives: For patients with colorectal cancer (CRC), the lung is the most common extra-abdominal site of distant metastasis. However, practices for chest imaging after colorectal resection vary widely. We aimed to identify characteristics that may indicate a need for early follow-up imaging.

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Objective: Chemotherapy plus nivolumab is the standard of care neoadjuvant treatment for patients with resectable stage IB to IIIA non-small cell lung cancer. The influence of dual checkpoint blockade with chemotherapy on surgical outcomes remains unknown. We aimed to determine operative complexity and perioperative outcomes associated with neoadjuvant chemotherapy and nivolumab with or without ipilimumab.

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Objective: We have previously demonstrated the negative impact of travel distance on adherence to surveillance imaging guidelines for resected non-small cell lung cancer (NSCLC). The influence of patient residential location on adherence to recommended postoperative treatment plans remains unclear. We sought to characterize the impact of travel distance on receipt of indicated adjuvant therapy in resected NSCLC.

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Objectives: Pulmonary metastasectomy (PM) for colorectal cancer may provide respite from systemic therapy and prolonged disease-free intervals. We sought to identify factors associated with PM and to characterize the differential impact on overall survival for those offered lung resection.

Methods: The National Cancer Database was queried for stage IV colorectal cancer patients with lung-limited metastatic disease between 2010 and 2016.

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Article Synopsis
  • Malignant pleural mesothelioma (MPM) has a poor prognosis despite treatment advancements, and patient selection for surgery often uses both objective and subjective criteria.
  • The study analyzed 99 MPM patients who received neoadjuvant therapy and underwent macroscopic complete resection, assessing factors affecting overall survival (OS).
  • Findings indicated that poor response to neoadjuvant therapy and non-epithelioid histology significantly reduced OS, stressing the need for personalized treatment discussions for affected patients.
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Objectives: Recent randomized trials have demonstrated a survival advantage with the use of local consolidative therapy in oligometastatic non-small cell lung cancer; however, the indications for and outcomes after pulmonary resection as a component of local consolidative therapy remain ill defined. We sought to characterize the perioperative and long-term survival outcomes among patients with resected oligometastatic non-small cell lung cancer.

Methods: Patients presenting to a single center (2000-2017) with oligometastatic non-small cell lung cancer (≤3 synchronous metastases, intrathoracic nodal disease counted as a single site) who underwent resection of the primary tumor were retrospectively identified.

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Background: Appropriately selected patients clearly benefit from resection of colorectal cancer (CRC) pulmonary metastases (PMs). However, there remains equipoise surrounding optimal chest surveillance strategies following pulmonary metastasectomy. We aimed to identify risk factors that may inform chest surveillance in this population.

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Article Synopsis
  • A study was done to see if adding immunotherapy to a common lung cancer treatment (SABR) would be better than using SABR alone in patients with early-stage lung cancer.
  • The trial involved 156 people, where half received just SABR and the other half received SABR with immunotherapy (called I-SABR).
  • After about 33 months, the results showed that those who got I-SABR had a much better chance of not having their cancer return compared to those who received just SABR.
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Objective: We evaluated self-reported financial burden (FB) after lung cancer surgery and sought to assess patient perspectives, risk factors, and coping mechanisms within this population.

Methods: Patients with lung cancer resected at our institution between January 1, 2016, and December 31, 2021, were surveyed. Descriptive and multivariable analyses were performed to evaluate the association between clinical and financial characteristics with patient-reported major ("significant" or "catastrophic") FB.

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