Publications by authors named "Shamseddine A"

Background: Hepatocellular carcinoma (HCC) is a significant health problem associated with several risk factors, increasingly driven by non-alcoholic steatohepatitis and metabolic syndrome. This association poses a challenge for the primary treatments of HCC, which may include immune checkpoint inhibitors and vascular endothelial growth factor inhibitors, due to their potential cardiotoxic effect. Therefore, it is imperative to balance the therapeutic effects of these agents with their potential cardiovascular adverse events.

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: Pancreatic cancer is among the malignancies with the poorest prognosis, largely due to its aggressive nature and resistance to conventional therapies. : This report describes the case of a 69-year-old male patient with stage IV primary lung adenocarcinoma presenting with high levels of programmed death-ligand 1 (PD-L1). Simultaneously, abdominal computed tomography (CT) showed a dilated pancreatic duct at the level of the pancreatic head and a hypodense lesion in the uncinate process involving the superior mesenteric artery.

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Gastrointestinal stromal tumors (GISTs) are rare malignant tumors that arise from the connective tissues of the gastrointestinal tract. Reports about GISTs treated with imatinib for over five years are exceedingly rare. In this case report, we present a patient with GIST who remained alive for two decades after undergoing imatinib treatment.

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The management of locally advanced rectal cancer (LARC) requires personalized treatment to improve outcomes and maintain quality of life. This narrative review examines the recent developments in management, focusing on non-operative management, radiotherapy choices or omission, chemotherapy sequencing, and the role of immunotherapy and brachytherapy boost. Non-operative management can be an option for select patients, and the use of long-course chemoradiation (LCCRT) with consolidation chemotherapy or brachytherapy boost has been shown to enhance rectal preservation rates.

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Objectives: Surveillance imaging for HPV-associated oropharyngeal carcinomas (OPCs) differs among physicians and institutions. Surveillance imaging can detect disease progression earlier, but can also contribute to anxiety and cost, without proven survival benefits. We sought to determine practice patterns of surveillance imaging and the number of surveillance scans needed to detect one recurrence in patients with HPV-associated OPCs.

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Article Synopsis
  • Fibroblast Activation Protein Inhibitor (FAPI) PET imaging is a new way to find problems with the pancreas, especially pancreatitis, more effectively than traditional methods.
  • A 52-year-old man with a history of cancer experienced stomach pain, leading doctors to use both FAPI and another type of scan called FDG PET to understand his condition better.
  • FAPI PET helped doctors tell the difference between pancreatic tumors and inflammation, showing how important this new imaging technique can be for accurate diagnosis.
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Hepatocellular carcinoma (HCC) is the third most common cause of cancer-related deaths. Classically, liver transplantation (LT) can be curative for HCC tumors within the Milan criteria. Bridging strategies to reduce the dropouts from LT waiting lists and/or to downstage patients who are beyond the Milan criteria are widely utilized.

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Prostate cancer (PC) is the second most prevalent cancer in males, with a steadily increasing incidence in the Middle East (ME). The aim of this study was to capture real-world data on the characteristics, disease progression, and treatment patterns among PC patients in the ME. This was a retrospective, observational, multi-centre study conducted across ten hospitals/research centers in Lebanon, Kingdom of Saudi Arabia, Iraq and Kuwait.

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Background: Developing countries have a significantly higher incidence of breast cancer in patients younger than 40 years as compared to developed countries. This study aimed to examine if young age at diagnosis is an independent prognostic factor for worse survival outcomes in breast cancer as well as the effect of age on Disease-free survival (DFS) and local recurrence free survival (LRFS) after adjusting for various tumor characteristics, local and systemic treatments.

Methods: This is a secondary analysis of prospective cohort of patients from two existing databases.

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Bladder cancer (BC) poses a significant health challenge, particularly in metastatic cases, where the prognosis is unfavorable and therapeutic options are limited. Poly ADP-ribose polymerase (PARP) inhibitors have gained approval for use in various cancer types, but their application in BC remains controversial, despite the notable prevalence of DNA damage response alterations in advanced or metastatic urothelial carcinomas. In this report, we describe a 66-year-old heavy-smoking female diagnosed with muscle-invasive BC.

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Background: A high neutrophil-lymphocyte ratio (NLR) may be associated with worse survival in esophageal cancer (EC). Our aims were to describe the demographic and clinical data of EC in a tertiary referral center in Lebanon and to determine the prognostic value of NLR.

Methods: A retrospective cohort study based on chart review of patients diagnosed with EC was conducted at the American University of Beirut Medical Center (AUBMC).

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Background: Less than two percent of pancreatic neuroendocrine tumors (NETs) produce serotonin. Serotonin can cause carcinoid syndrome and less commonly carcinoid heart disease (CHD). CHD is associated with increased mortality and requires a more aggressive approach.

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Gastric cancer (GC) ranks as the fifth most prevalent cancer and the fourth deadliest cancer worldwide. In the Middle East and North Africa (MENA) region, GC represents about 4.8% of cancer cases with more than 35,000 new cases in 2020.

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Background: We report the outcomes of cisplatin-ineligible HNSCC patients treated with definitive chemoradiation and concurrent carboplatin and paclitaxel.

Materials And Methods: We included consecutive HNSCC patients treated from 2013 to 2021 that received definitive chemoradiation with carboplatin and paclitaxel. Locoregional recurrences (LRR) and distant metastases (DM) were estimated using cumulative incidence functions.

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Renal cell carcinoma (RCC) management has seen a revolution over the last decades. Six Lebanese oncologists discussed recent updates in RCC management and outlined the challenges and future directions in Lebanon. Sunitinib continues to be a first-line choice for metastatic RCC in Lebanon, except for intermediate- and poor-risk patients.

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Ovarian cancer is the most lethal gynecologic cancer. The high grade serous epithelial (HGSE) subtype is the most aggressive and it often presents at advanced stages, while screening programs have not proven beneficial. Management of the advanced stages (FIGO III and IV), which constitute the majority of diagnoses, usually consists of platinum-based chemotherapy and cytoreductive surgery (primary or interval) followed by maintenance therapy.

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The incidence of colorectal cancer (CRC) in the Middle East is increasing, especially among those younger than 50 years. Risk factors including obesity, sedentary lifestyle, and dietary changes are associated with the epidemiologic shift and are a result of socioeconomic changes happening in the region. Worldwide, CRC screening is associated with decreased incidence and mortality of CRC, but screening uptake is still low in the Middle East because of cultural barriers and lack of awareness; in addition, most countries do not have national screening programs.

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Background: Extra-gastrointestinal stromal tumor is a rare subtype of soft tissue sarcomas with significantly variable presentation, management, and prognosis. This makes it crucial to report the different institutional experiences of encountering extra-gastrointestinal stromal tumors (EGIST).

Case Presentation: We report 3 cases of EGIST diagnosis at American University of Beirut Medical Center for 2 males and 1 female in the 5th, 6th, and 7th decades of life, respectively.

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Targeted monoclonal antibody therapy against Epidermal Growth Factor Receptor (EGFR) is a leading treatment modality against metastatic colorectal cancer (mCRC). However, with the emergence of KRAS and BRAF mutations, resistance was inevitable. Cells harboring these mutations overexpress Glucose Transporter 1 (GLUT1) and sodium-dependent vitamin C transporter 2 (SVCT2), which enables intracellular vitamin C transport, leading to reactive oxygen species generation and finally cell death.

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Background And Aims: In light of the inconclusive evidence on the association between vitamin C status and colorectal cancer (CRC) outcome, this study assessed the prognostic value of vitamin C in participants with metastatic CRC (mCRC).

Methods: Adults with mCRC and cancer-free controls were recruited in this prospective cohort study to allow for comparison of vitamin C levels with healthy individuals from the same population. Sociodemographic, lifestyle, medical variables, BRAF and KRAS mutations, as well as Vitamin C plasma level and food intake were evaluated.

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Purpose: Rarely, well-differentiated gastro-entero-pancreatic neuroendocrine tumors (GEP NETs) can have positive uptake on 18F-fluorodeoxyglucose-PET/computerized tomography ( 18 F-FDG-PET/CT), with or without a positive 68 Ga-PET/CT. We aim to evaluate the diagnostic role of 18 F-FDG-PET/CT in patients with well-differentiated GEP NETs.

Methods: We retrospectively reviewed a chart of patients diagnosed with GEP NETs between 2014 and 2021, at the American University of Beirut Medical Center, who have low (G1; Ki-67 ≤2) or intermediate (G2; and Ki-67 >2-≤20) well-differentiated tumors with positive findings on FDG-PET/CT.

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Purpose: The management of patients with advanced solid malignancies increasingly uses stereotactic body radiation therapy (SBRT). Advanced cancer patients are at risk for developing leptomeningeal metastasis (LM), a fatal complication of metastatic cancer. Cerebrospinal fluid (CSF) is routinely collected during computed tomography (CT) myelography for spinal SBRT planning, offering an opportunity for early LM detection by CSF cytology in the absence of radiographic LM or LM symptoms (subclinical LM).

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While most cases of thrombotic microangiopathic hemolytic anemias are idiopathic, some can occur in the setting of a malignancy. Differentiating both conditions is crucial to initiate the appropriate treatment. In this case report and literature review, we discuss the occurrence of a thrombotic microangiopathy in a 61-year-old male patient with a treatment-refractory metastatic colorectal cancer invading his bone marrow.

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Background: Cardiac liver cirrhosis secondary to Fontan procedure has been associated with hepatocellular carcinoma at a younger age. However, Fontan associated liver disease and combined hepatocellular-cholangiocarcinoma has not been previously reported. Combined hepatocellular-cholangiocarcinoma is a rare cancer that accounts for 2-5% of primary liver tumors and poses significant diagnostic and treatment challenges.

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Limited data exist on the management of patients with locally advanced (aPC) or metastatic pancreatic (mPC) cancer who achieve stable disease/response after first-line chemotherapy. In this setting, maintenance therapy is important to minimize toxicity while preserving survival benefits. The aim of this study is to conduct a narrative review of the evidence available on the topic and present the results of a retrospective case series of patients with aPC or mPC who received maintenance therapy following a good response to induction chemotherapy.

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