Publications by authors named "Dimitrios Mavroudis"

Background: The treatment landscape of non-metastatic non-small cell lung cancer (NM-NSCLC) is rapidly evolving with recent approvals of immunotherapies and targeted therapies.

Methods: This retrospective study included 202 adults diagnosed with NM-NSCLC between 1 January 2018 and 31 December 2020 primarily aiming to capture initial management strategies.

Results: Most frequent treatment patterns among Stage I/II patients ( = 84) were surgery only (48.

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Background: The 313-variant polygenic risk score (PRS) provides a promising tool for clinical breast cancer risk prediction. However, evaluation of the PRS across different European populations which could influence risk estimation has not been performed.

Methods: We explored the distribution of PRS across European populations using genotype data from 94,072 females without breast cancer diagnosis, of European-ancestry from 21 countries participating in the Breast Cancer Association Consortium (BCAC) and 223,316 females without breast cancer diagnosis from the UK Biobank.

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Article Synopsis
  • Clinical genetic testing helps find cancer risks by identifying gene changes, but some of these changes are confusing because we don't know what they mean (called VUS).
  • Researchers studied a huge number of breast cancer patients and healthy people to understand these confusing gene changes better.
  • They found that their method of analyzing data closely matches what other experts say about which gene changes are harmless or harmful, giving more information about 785 unclear changes.
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The Fas/Fas ligand (FasL) system is a major apoptosis-regulating pathway with a key role in tumor immune surveillance and metastasis. The expression of Fas/FasL on mammary tumor tissues holds prognostic value for breast cancer (BC) patients. We herein assessed Fas/FasL expression on circulating tumor cells (CTCs) and matched peripheral blood mononuclear cells (PBMCs) from 98 patients with metastatic BC receiving first-line treatment.

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  • * Analysis of data from over 55,000 breast cancer patients showed that co-observation of variants in BRCA1, BRCA2, and PALB2 with other breast cancer genes occurred less frequently than expected, suggesting a potential correlation with pathogenicity.
  • * The findings indicate that identifying a variant of uncertain significance alongside a known pathogenic variant supports evidence against the variant's pathogenicity, which could improve variant classification in clinical settings and for other genetic conditions.
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Background: Colorectal cancer (CRC) significantly contributes to cancer-related mortality, necessitating the exploration of prognostic factors beyond TNM staging. This study investigates the composition of the gut microbiome and microbial DNA fragments in stage II/III CRC.

Methods: A cohort of 142 patients with stage II/III CRC and 91 healthy controls underwent comprehensive microbiome analysis.

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To investigate the incidence and prognostically significant correlations and cooperations of LKB1 loss of expression in non-small cell lung cancer (NSCLC), surgical specimens from 188 metastatic and 60 non-metastatic operable stage I-IIIA NSCLC patients were analyzed to evaluate their expression of LKB1 and pAMPK proteins in relation to various processes. The investigated factors included antitumor immunity response regulators STING and PD-L1; pro-angiogenic, EMT and cell cycle targets, as well as metastasis-related (VEGFC, PDGFRα, PDGFRβ, p53, p16, Cyclin D1, ZEB1, CD24) targets; and cell adhesion (β-catenin) molecules. The protein expression levels were evaluated via immunohistochemistry; the RNA levels of LKB1 and NEDD9 were evaluated via PCR, while KRAS exon 2 and BRAF mutations were evaluated by Sanger sequencing.

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  • The text references a correction to the original article identified by the DOI 10.3389/fmolb.2021.668534.
  • It indicates there was an error or inaccuracy in the published research that needed to be amended.
  • Such corrections are important for maintaining the integrity and reliability of scientific literature.
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The early diagnosis of lung cancer improves the probability of successful treatment. However, patients and physicians face several difficulties that can considerably delay the diagnostic process. A mixed-methods study that would follow the patient's journey throughout the diagnostic process could alleviate these difficulties.

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The 313-variant polygenic risk score (PRS) provides a promising tool for breast cancer risk prediction. However, evaluation of the PRS across different European populations which could influence risk estimation has not been performed. Here, we explored the distribution of PRS across European populations using genotype data from 94,072 females without breast cancer, of European-ancestry from 21 countries participating in the Breast Cancer Association Consortium (BCAC) and 225,105 female participants from the UK Biobank.

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Background: Limited information exists on epidermal growth factor receptor molecular epidemiology in Greece. Next-generation sequencing (NGS) is the recommended method for genotyping in NSCLC. The Idylla Biocartis platform is a fully automated system for actionable mutation detection.

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  • This study focused on collecting real-world evidence about treatment patterns and patient profiles for advanced melanoma in Greece between January 2015 and January 2018, using data from six oncology clinics.
  • A total of 225 patients were included, with a median age of 62.6 years; most were diagnosed with metastatic disease and had common metastatic sites in the lungs, lymph nodes, and liver.
  • Treatment options mostly involved targeted therapy (53.3%) and immunotherapy (45.3%), with the most common first-line regimens being combinations of BRAF inhibitors with MEK inhibitors and anti-PD-1 monotherapy.
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Retroperitoneal soft tissue sarcoma (RPS) is a rare and heterogenous disease for which surgery is the cornerstone of treatment. However, the local recurrence rate is much higher than in soft tissue sarcoma of the extremities since wide resection is usually unfeasible in RPS due to its large size, indistinct tumour borders, anatomical constraints and the thinness of the overlying peritoneum. Local recurrence is the leading cause of death for low-grade RPS, whereas high-grade tumours are prone to distant metastases.

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The personalization of therapies in breast cancer has favoured the introduction of new molecular-targeted therapies into clinical practice. Among them, cyclin-dependent kinases 4 and 6 (CDK4/6) inhibitors have acquired increasing importance, with the approval in recent years of palbociclib, ribociclib, and abemaciclib in combination with endocrine therapy. Currently, no guidelines are available to monitor and manage potential long-term toxicities associated with the use of these drugs.

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Febrile neutropenia (FN) is a common but serious complication encountered in patients with cancer and is associated with significant morbidity and mortality. In this prospective study, 63 patients with solid tumors under chemotherapy or immunotherapy were admitted to the hospital due to febrile neutropenia, confirmed through clinical or microbiological documentation. The aim of this study was to provide a comprehensive overview of the epidemiological and microbiological characteristics of hospitalized neutropenic patients with solid tumors undergoing treatment.

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Background: This study aimed to investigate the molecular profiles of 237 stage III CRC patients from the international IDEA study. It also sought to correlate these profiles with Toll-like and vitamin D receptor polymorphisms, clinicopathological and epidemiological characteristics, and patient outcomes.

Methods: Whole Exome Sequencing and PCR-RFLP on surgical specimens and blood samples, respectively, were performed to identify molecular profiling and the presence of Toll-like and vitamin D polymorphisms.

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  • Breast cancer is a leading cause of cancer-related deaths in women and traditional radiotherapy can unintentionally harm the heart and lead to cardiovascular issues, especially in left-sided cases.
  • Recent advancements in radiotherapy techniques aim to minimize heart exposure to harmful doses and reduce the risk of heart disease post-treatment.
  • The review focuses on current strategies that protect the heart during radiation treatment for breast cancer, emphasizing the importance of technology, patient positioning, and various treatment factors in achieving safer outcomes.
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  • Polygenic risk scores (PRSs), derived from genome-wide association studies (GWASs), can enhance breast cancer risk evaluation but are primarily based on European populations.
  • This study analyzed the effectiveness of European-based PRS models in identifying breast cancer risk among Ashkenazi Jewish women in Israel using data from two cohorts.
  • Results indicated that these PRS models successfully identified Ashkenazi Jewish women at high risk for breast cancer, suggesting they could improve risk assessment in this group.
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  • * The study revealed significant variation in the prevalence of four common PTVs across different regions in Europe, with p.Gln1701* being most common in Northern Europe and p.Gly1906Alafs*12 most common in Southern Europe.
  • * Findings suggest that the distribution of rare PTVs is more heterogeneous in Southwestern and Central Europe compared to Northeastern Europe, which will aid in crafting targeted genetic testing for breast cancer in specific European populations.
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  • Breast cancer patients with the CHEK2 c.1100delC variant have a heightened risk of developing a second breast cancer (contralateral breast cancer) and generally experience worse survival outcomes compared to those without the variant.
  • A study involving over 82,000 women aimed to evaluate how the CHEK2 variant, radiotherapy, and systemic treatments affect the risk of contralateral breast cancer and breast cancer-specific survival.
  • Findings indicated that while systemic therapy (especially the combination of chemotherapy and endocrine therapy) lowers the risk of contralateral breast cancer, CHEK2 c.1100delC carriers still faced poorer survival rates, suggesting other factors at play beyond the risk of developing a second cancer.*
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  • The study aimed to gather real-world data on the EGFR mutational profile and treatment strategies for advanced non-small-cell lung cancer (NSCLC) patients after first/second-generation EGFR-TKI treatment.
  • Ninety-six patients were enrolled in Greece, with re-biopsies conducted for some who were negative for the T790M mutation.
  • Results showed that 21.9% of patients were T790M-positive, and those receiving third-generation EGFR-TKIs had better outcomes, highlighting the importance of mutational status and treatment choices in improving response rates and progression-free survival.
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  • - The study investigated the links between genetic variants in breast cancer susceptibility genes (besides BRCA1, BRCA2, and CHEK2) and risks of developing contralateral breast cancer (CBC) and breast cancer-specific survival (BCSS) in 34,401 women of European ancestry who had been diagnosed with breast cancer.
  • - Significant findings revealed that protein-truncating variants (PTVs) and certain missense variants (MSVs) in genes like BRCA1, BRCA2, TP53, CHEK2, and PALB2 were associated with higher CBC risk and negative impacts on BCSS, indicating that these genetic factors play a crucial role in cancer outcomes.
  • - The results showed minimal
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Breast cancer (BC) patients with a germline c.1100delC variant have an increased risk of contralateral BC (CBC) and worse BC-specific survival (BCSS) compared to non-carriers. We aimed to assess the associations of c.

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