Publications by authors named "Valentin T"

Article Synopsis
  • Sarcomas are not typically associated with Lynch Syndrome (LS), but recent literature suggests a connection, prompting a national study to investigate their characteristics in LS patients.
  • The SarcLynch study included 81 patients, finding that 83% had soft-tissue sarcomas, particularly pleomorphic variants like undifferentiated pleomorphic sarcoma and pleomorphic rhabdomyosarcoma, with 40% having sarcoma as their first cancer event.
  • Results showed a high prevalence of mismatch repair deficiency and promising responses to immune checkpoint inhibitors, suggesting the need for screening and potential immunotherapy for these sarcomas.
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End-stage liver diseases have an increasing impact worldwide, exacerbated by the shortage of transplantable organs. Recognized as one of the promising solutions, tissue engineering aims at recreating functional tissues and organs . The integration of bioprinting technologies with biological 3D models, such as multi-cellular spheroids, has enabled the fabrication of tissue constructs that better mimic complex structures and functionality of organs.

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Article Synopsis
  • - The Ewing Sarcoma Family of Tumors (ESFT) includes rare cancers, with a significant portion showing metastatic spread, especially affecting bone and bone marrow, which worsens prognosis and necessitates stronger treatments.
  • - The French phase II COMBINAIR3 study compared the effectiveness of PET/CT to traditional bone marrow aspiration and biopsy (BMAB) for staging extra-pulmonary metastatic ESFT in 42 patients.
  • - Results indicated that PET/CT had high specificity (100%) and notable sensitivity (83.3%) in detecting bone marrow involvement, suggesting it can replace BMAB for initial staging, thereby enhancing treatment planning for high-risk ESFT patients.
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Aquaculture is expected to play a vital role in solving the challenge of sustainably providing the growing world population with healthy and nutritious food. Pathogen outbreaks are a major risk for the sector, so early detection and a timely response are crucial. This can be enabled by monitoring the pathogen levels in aquaculture facilities.

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Background: To better understand the importance of the New York esophageal squamous cell carcinoma 1 (NY-ESO-1) and human leukocyte antigen (HLA) subtypes in treatment decision-making, further investigation of their prevalence and prognostic impact among patients with metastatic synovial sarcoma (mSS) is needed.

Patients And Methods: This was a retrospective clinico-biological cohort study of adults with mSS. Patient data were collected from the French Sarcoma Group NetSARC database and supplemented by electronic medical records.

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The assessment of chemotherapy response in osteosarcoma (OS) based on the average percentage of viable cells is limited, as it overlooks the spatial heterogeneity of tumor cell response (foci of resistant cells), immune microenvironment, and bone microarchitecture. Despite the resulting positive classification for response to chemotherapy, some patients experience early metastatic recurrence, demonstrating that our conventional tools for evaluating treatment response are insufficient. We studied the interactions between tumor cells, immune cells (lymphocytes, histiocytes, and osteoclasts), and bone extracellular matrix (ECM) in 18 surgical resection samples of OS using multiplex and conventional immunohistochemistry (IHC: CD8, CD163, CD68, and SATB2), combined with multiscale characterization approaches in territories of good and poor response (GRT/PRT) to treatment.

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Article Synopsis
  • A phase II trial (OSAD93) tested the effectiveness of combining ifosfamide (IFO) and cisplatin (CDDP) without doxorubicin as a neoadjuvant treatment for adult osteosarcoma, focusing on patients with localized high-grade tumors.
  • The study included 60 patients who received four courses of chemotherapy, with the primary goal being a Good Histological Response (GHR) of 10% or fewer residual tumor cells in over 30% of patients, and secondary outcomes of disease-free survival (DFS), overall survival (OS), and toxicity.
  • Although the GHR target was not achieved, the study showed promising long-term survival rates (5-year DFS 51.
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Background: Perivascular epithelioid cell neoplasms (PEComas) encompass a heterogeneous family of mesenchymal tumors. Previously described clinicopathologic features aimed at distinguishing benign from malignant variants but lacked prognostic value.

Methods: This retrospective analysis examined clinicopathologic data from patients who had localized PEComa across French Sarcoma Network centers.

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Adult-type gynecological soft tissue and visceral sarcomas are rare tumors, with an estimated incidence of 13% of all sarcomas and 4% of all gynecological malignancies. They most often develop in the uterus (83%), followed by the ovaries (8%), vulva and vagina (5%), and other gynecological organs (2%). The objective of this review is to provide an overview of the current management of gynecological sarcomas, according to international guidelines.

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Background: We investigated the impact of the implementation of a network of reference centers for sarcomas (NETSARC) on the care and survival of sarcoma patients in France since 2010.

Patients And Methods: NETSARC (netsarc.org) is a network of 26 reference sarcoma centers with specialized multidisciplinary tumor boards (MDTBs), funded by the French National Cancer Institute (INCa) since 2010.

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Background: Using adaptive radiotherapy (ART), to determine objective clinical criteria that identify extremity soft tissue sarcoma (ESTS) patients requiring adaptation of their preoperative radiotherapy (RT) plan.

Patients And Methods: We included 17 patients with a lower extremity ESTS treated between 2019 and 2021 with preoperative RT, using helicoidal intensity-modulated RT (IMRT) tomotherapy, before surgical resection. We collected clinical, tumor parameters and treatment data.

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Unlabelled: Sclerosing Epithelioid Fibrosarcoma (SEF) and Low Grade Fibromyxoid Sarcoma (LGFMS) are ultrarare sarcomas sharing common translocations whose natural history are not well known. We report on the nationwide exhaustive series of 330 patients with SEF or LGFMS in NETSARC+ since 2010.

Patients And Methods: NETSARC (netsarc.

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Epithelioid Hemangioendothelioma: A NATIONWIDE STUDY: Epithelioid hemangioendothelioma (EHE) is an ultrarare sarcoma whose natural history and treatment is not well defined. We report on the presentation and outcome of 267 patients with EHE in the NETSARC+ network since 2010 in France.

Patients And Methods: NETSARC (netsarc.

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To investigate the immune biomarker in Leiomyosarcoma (LMS), which is rare and recognized as an immune cold cancer showing a poor response rate (<10%) to immune checkpoint inhibitors (ICIs). However, durable response and clinical benefit to ICIs has been observed in a few cases of LMS, including, but not only, LMS with tertiary lymphoid structure (TLS) structures. We used comprehensive transcriptomic profiling and a deconvolution method extracted from RNA-sequencing gene expression data in two independent LMS cohorts, the International Cancer Genome Consortium (ICGC, N = 146) and The Cancer Genome Atlas (TCGA, N = 75), to explore tumor immune microenvironment (TIME) in LMS.

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Introduction: Retroperitoneal liposarcoma (RPL) is a rare primary mesenchymal tumour that develops in retroperitoneal adipose tissue. Unlike the majority of published series, this homogeneous cohort focuses on RPL. The main purpose of this study is to evaluate the overall and recurrence-free survival of RPLs who underwent excision surgery and the prognostic factors involved.

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Background: Sarcoma is a heterogeneous group of diseases with few treatment options. Immunotherapy has shown little activity in studies including unselected sarcomas, but immune checkpoint blockers have shown activity in specific histotypes. We evaluated the activity of pembrolizumab in rare and ultra-rare sarcomas.

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Article Synopsis
  • Lynch syndrome (LS) is linked to a higher risk of various tumors, including colorectal and non-colorectal cancers, with recent studies suggesting a potential association with sarcomas.
  • A systematic review of 44 studies involving LS patients revealed that most sarcomas developed in individuals with a mutation in the MSH2 gene and showed distinct genetic features typical of LS-related tumors.
  • Among the types of sarcomas observed, undifferentiated pleomorphic sarcoma, leiomyosarcoma, and liposarcoma were the most common, but there was also a notable occurrence of rhabdomyosarcoma, warranting further research to understand this specific group better.
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In 2018, EUCAST released guidelines on rapid antimicrobial susceptibility testing (RAST) directly from positive blood culture bottles for selected bacterial species and antimicrobial agents, but not for the commonly used agents amoxicillin/clavulanate (AMC) and ampicillin/sulbactam (SAM).. This work addresses the RAST capability gap for betalactam/betalactamase inhibitor combinations.

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Article Synopsis
  • Aprepitant, an antiemetic drug, has been linked to cases of encephalopathy when combined with ifosfamide, potentially due to its effects on metabolic pathways.
  • The study analyzed the pharmacokinetics of ifosfamide and its metabolites in 42 patients with soft tissue sarcomas, comparing data from cycles with and without aprepitant.
  • The results showed that aprepitant did not significantly alter the pharmacokinetic parameters of ifosfamide or its metabolites, although some other metabolites were not assessed.
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In leiomyosarcoma (LMS), a very aggressive disease, a relatively transcriptionally uniform subgroup of well-differentiated tumors has been described and is associated with poor survival. The question raised how differentiation and tumor progression, two apparently antagonist processes, coexist and allow tumor malignancy. We first identified the most transcriptionally homogeneous LMS subgroup in three independent cohorts, which we named 'hLMS'.

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Article Synopsis
  • CIC-rearranged sarcomas (CIC-RS) are aggressive tumors often treated differently than Ewing sarcomas, prompting a study on their characteristics, treatments, and outcomes in France.
  • The study included 79 patients from 13 centers, finding that the median age was 27 years and that the median overall survival from diagnosis was 18 months, with no significant survival difference between patients treated as Ewing sarcomas and those treated as high-grade soft tissue sarcomas.
  • Among patients with metastatic disease at diagnosis, those treated for Ewing sarcomas had instances of survival and remission, unlike those treated as high-grade soft tissue sarcomas, reinforcing the aggressive nature of CIC-RS.
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Background: To prevent further spread of the disease and secondary deformity, musculoskeletal tuberculosis (TB) remains a challenge in terms of early diagnosis and treatment. This study gives an overview on TB trends in Austria (pulmonary and extrapulmonary TB) (A) and analyses a retrospective series of musculoskeletal TB cases diagnosed and treated at an Austrian tertiary centre (B).

Methods: (A) We analysed data obtained from the Austrian national TB registry to provide information on TB patients´ demographics and manifestation sites between 1995 and 2019.

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Background: Febrile neutropenia (FN) after chemotherapy is a major cause of morbidity during cancer treatment. The performance of metagenomic next-generation sequencing (mNGS) of circulating cell-free deoxyribonucleic acid from plasma may be superior to blood culture (BC) diagnostics for identification of causative pathogens. The aim of this study was to validate mNGS (DISQVER test) for the detection of pathogens in hematologic patients with FN.

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