Publications by authors named "Gantzer J"

Desmoid fibromatosis is a rare locally aggressive soft tissue tumor that is characterized as benign as it cannot metastasize. It was managed until recently like sarcomas, i.e with radical surgical resection combined or not with radiotherapy.

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  • Sclerosing epithelioid fibrosarcoma (SEF) is a rare type of cancer characterized by specific cell arrangements and unique traits, including a distinct immunohistochemical pattern and gene rearrangements involving EWSR1 and CREB3L genes.
  • Although typically found in deep soft tissues, SEF can also occur in bones and other organs; however, this report highlights a rare case of SEF originating in the brain, specifically the left occipital region.
  • The study discusses the necessary differential diagnoses for brain tumors and provides a detailed genetic and epigenetic comparison of this brain tumor to more common systemic cases of SEF.
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Background And Aims: Alveolar soft part sarcoma (ASPS) is an ultra-rare chemo-resistant sarcoma in children, occurring preferentially in young adults. We aimed to describe and compare its clinical presentation and behaviour in children and young adults to determine whether the same therapeutic strategy should be addressed for both populations.

Methods: National retrospective multicentre study of children (0-18 years) vs.

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Purpose: This study investigates changes in CD8+ cells, CD8+/Foxp3 ratio, HLA I expression, and immune coregulator density at diagnosis and upon neoadjuvant chemotherapy (NACT), correlating changes with clinical outcomes.

Experimental Design: Multiplexed immune profiling and cell clustering analysis were performed on paired matched ovarian cancer samples to characterize the immune tumor microenvironment (iTME) at diagnosis and under NACT in patients enrolled in the CHIVA trial (NCT01583322).

Results: Several immune cell (IC) subsets and immune coregulators were quantified pre/post-NACT.

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  • * A survey conducted from February 2021 to August 2022 among healthcare professionals in France highlighted a lack of adherence to the 2018 ESGO recommendations for LACC treatment, with notable differences in practices between university hospitals and other settings.
  • * Compliance rates were particularly low among gynecologic surgeons, with only 5.7% aligning with ESGO guidelines, which may directly affect patient outcomes; thus, there's a potential need for more structured care in specialized centers.
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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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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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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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  • This study explored the characteristics, management, and outcomes of patients with active cancer who were admitted for cardiogenic shock, finding that they made up about 6.6% of the 772 enrolled patients.
  • Although active cancer patients had similar initial in-hospital outcomes as non-cancer patients, they required more intensive drug management but received less mechanical support.
  • While both groups had similar 30-day mortality rates, the active cancer group had significantly higher long-term mortality rates at 1 year, indicating that active cancer dramatically impacts survival after initial treatment for cardiogenic shock.
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Renal medullary carcinoma (RMC) is an aggressive tumour driven by bi-allelic loss of SMARCB1 and tightly associated with sickle cell trait. However, the cell-of-origin and oncogenic mechanism remain poorly understood. Using single-cell sequencing of human RMC, we defined transformation of thick ascending limb (TAL) cells into an epithelial-mesenchymal gradient of RMC cells associated with loss of renal epithelial transcription factors TFCP2L1, HOXB9 and MITF and gain of MYC and NFE2L2-associated oncogenic and ferroptosis resistance programs.

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  • A case study is presented of a patient whose postchemotherapy thymic teratoma developed an MNT component and later experienced vertebral metastasis corresponding to anaplastic MNT, highlighting the complications that can arise from teratomas.
  • Genetic analysis revealed 19 shared somatic mutations among the tumor components, with several mutations found in known cancer-related genes, suggesting a potential pathway for the progression of MNT transformation and underscoring the need for
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Background: Osimertinib is approved in first line metastatic epidermal growth factor receptor (EGFR) mutated non-small cell lung cancer (NSCLC). Acquired L718V mutation is a rare mechanism of resistance towards osimertinib in L858R+ NSCLC with potential sensibility to afatinib. This case reported an acquired L718V/TP53 V727M resistance co-mutation to osimertinib with discordant molecular pattern between plasmatic and cerebral fluid in a leptomeningeal and bone metastatic L858R mutant NSCLC.

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Pain is a common manifestation of several benign and malignant conditions. Inadequate response to conservative therapies is often succeeded by incremental use of analgesics and opioids; however, such an approach is often ineffective, not well tolerated by patients, and carries the risk of addiction leading to the opioid crisis. Implementing minimally invasive percutaneous procedures, performed by interventional radiologists has proven to be successful in providing safe, effective, and patient-specific therapies across a wide range of painful conditions.

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Aim: The oral anti-angiogenic therapy nintedanib prolongs progression-free survival (PFS) when combined with chemotherapy after primary surgery for advanced epithelial ovarian cancer. The randomized phase II CHIVA trial evaluated the impact of combining nintedanib with neoadjuvant chemotherapy (NACT) for epithelial ovarian cancer.

Methods: Patients with newly diagnosed unresectable FIGO stage IIIC-IV epithelial ovarian cancer received 3-4 cycles of carboplatin plus paclitaxel every 3 weeks as NACT before interval debulking surgery (IDS), followed by 2-3 post-operative cycles.

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  • 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: According to guidelines, all patients with sarcoma must be managed from initial diagnosis at expert sarcoma centers. However, in everyday practice, the time interval to an expert center visit can be long, which delays presentation to an expert multidisciplinary tumor board and increases the risk of inappropriate management, negatively affecting local tumor control and prognosis. The advent of mobile health offers an easy way to facilitate communication and cooperation between general health care providers (eg, general practitioners and radiologists) and sarcomas experts.

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  • Cancer treatments and aging are causing more patients to experience acute cardiovascular diseases, including cardiogenic shock.
  • The causes of cardiogenic shock in cancer patients differ from those in non-cancer patients, requiring a specific management approach that involves multiple medical specialists.
  • Despite the lack of a definitive treatment for cardiogenic shock in cancer patients, intensive supportive care can often help, as many cases may be reversible; recent guidelines can assist in managing these situations.
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Introduction: Cancer patients are at high risk of developing septic shock (SSh) and are increasingly admitted to ICU given their improved long-term prognosis. We, therefore, compared the prognosis of cancer and non-cancer patients with SSh. Methods: We conducted a monocentric, retrospective cohort study (2013−2019) on patients admitted to ICU for SSh.

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The national reference network NETSARC+ provides remote access to specialized diagnosis and the Multidisciplinary Tumour Board (MTB) to improve the management and survival of sarcoma patients in France. The IGéAS research program aims to assess the potential of this innovative organization to address geographical inequalities in cancer management. Using the IGéAS cohort built from the nationwide NETSARC+ database, the individual, clinical, and geographical determinants of the 3-year overall survival of sarcoma patients in France were analyzed.

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Background: Thoracic SMARCA4-deficient undifferentiated tumors (SMARCA4-UT) are aggressive neoplasms. Data linking BAF alterations with tumor microenvironment (TME) and efficacy of immune checkpoint inhibitors (ICI) are contradictory. The TME of SMARCA4-UT and their response to ICI are unknown.

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Desmoid tumours (DT) are rare locally infiltrative soft-tissue tumours which do not metastasise. DT arise sporadically or are associated with familial syndromes, with different clinical and genetic patterns. In recent years there has been an increasing therapeutic role of cryoablation for the treatment of sporadic DT.

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