Publications by authors named "Jean-Jacques Mazeron"

Background: Gammaknife radiosurgery (GKRS) is a valuable option to control cerebral metastases. However, the risk (adverse radiation effect (ARE))-benefit (local control (LC)) ratio switches when the target is too large.

Objective: In order to balance this ratio, two fractions staged GKRS protocol was conducted for "large" cerebral metastases.

View Article and Find Full Text PDF

Objectives: Head & Neck Paragangliomas have been historically relying on surgery mostly, with worsened quality of life and major sequelae. Conventional external radiation therapy seems to offer an equivalent control rate with a low toxicity profile. The aim of this study was to assess the safety and efficiency of intensity-modulated radiation therapy in Head & Neck paragangliomas.

View Article and Find Full Text PDF

Background: Randomised, controlled trials and meta-analyses have shown the survival benefit of concomitant chemoradiotherapy or hyperfractionated radiotherapy in the treatment of locally advanced head and neck cancer. However, the relative efficacy of these treatments is unknown. We aimed to determine whether one treatment was superior to the other.

View Article and Find Full Text PDF

Background And Purpose: The Meta-Analysis of Chemotherapy in squamous cell Head and Neck Cancer (MACH-NC) demonstrated that concomitant chemotherapy (CT) improved overall survival (OS) in patients without distant metastasis. We report the updated results.

Materials And Methods: Published or unpublished randomized trials including patients with non-metastatic carcinoma randomized between 1965 and 2016 and comparing curative loco-regional treatment (LRT) to LRT + CT or adding another timing of CT to LRT + CT (main question), or comparing induction CT + radiotherapy to radiotherapy + concomitant (or alternating) CT (secondary question) were eligible.

View Article and Find Full Text PDF

Objective: To evaluate the effect of chemotherapy added to a surgical locoregional treatment (LRT) for patients with locally advanced head and neck squamous cell carcinoma (HNSCC).

Materials And Methods: We studied the sub-group of trials with surgical LRT included in the meta-analysis on chemotherapy in head and neck cancer (MACH-NC). Data from published and unpublished randomized trials comparing the addition of chemotherapy to LRT in HNSCC patients were sought using electronic database searching for the period 1965-2000, hand searching and by contacting experts in the field.

View Article and Find Full Text PDF

Background: The objective of the study was to evaluate the outcomes in terms of efficacy and safety of a large consecutive series of 362 patients with renal cell carcinoma (RCC) brain metastases treated using stereotactic radiosurgery (SRS) in the tyrosine kinase inhibitor (TKI) era.

Patients And Methods: From 2005 to 2015, 362 consecutive patients with brain metastases from RCC were treated using SRS in 1 fraction: 226 metastases (61 patients) using Gamma-Knife at a median of 18 Gy (50% isodose line); 136 metastases (63 patients) using linear accelerator at a median of 16 Gy (70% isodose line). The median patient age was 58 years.

View Article and Find Full Text PDF

Meningiomas account for 30-35% of intracranial tumors. Grade I meningiomas are most common and carry the best prognosis. Grade II and III meningiomas are more aggressive and the outcomes after surgical resection alone remain unsatisfactory.

View Article and Find Full Text PDF

Life expectancy of patients treated for brain tumors has lengthened due to the therapeutic improvements. Cognitive impairment has been described following brain radiotherapy, but the mechanisms leading to this adverse event remain mostly unknown. Technical evolutions aim at enhancing the therapeutic ratio.

View Article and Find Full Text PDF

Information on the role of radiotherapy in anti-PD-1 monoclonal antibody-treated melanoma patients is limited. We report on a prospective cohort of advanced melanoma patients treated simultaneously with radiotherapy and anti-PD-1 therapy between 01/01/15 and 30/06/16. Tumor evaluations (RECIST 1.

View Article and Find Full Text PDF
Article Synopsis
  • The study examines how certain systemic chemotherapy treatments can influence the development of brain metastases in cancer patients, highlighting that some anticancer drugs may accelerate metastatic progression, particularly in animal models and suggested in humans.
  • Data from 413 patients treated for brain metastasis showed median time to first brain metastasis was 13.1 months, with varied brain metastasis-free survival (bMFS) times depending on the primary cancer type, ranging from 1.5 months for lung cancer to 50.9 months for breast cancer.
  • Notably, patients with a lung primary tumor and those treated with taxane chemotherapy faced significantly shorter bMFS, while having a breast primary tumor was linked to
View Article and Find Full Text PDF

Actuality was dense in 2017 for oncology and hematology. The editorial board of the Bulletin du Cancer proposes a selection of key data distinguishing four trends: precision medicine, immunotherapy, focus on early stages and global management of metastatic disease. A summary of results which have been published or presented in congresses is proposed and the impact on daily practices is discussed.

View Article and Find Full Text PDF

Little is known about the natural history of cancer and its evolution to metastasis. Paget was the first to postulate the important role played by microenvironment in metastasis progression. Since, the concept of his "seed and soil" theory has been supported and confirmed.

View Article and Find Full Text PDF

OBJECTIVE Grade II meningiomas, which currently account for 25% of all meningiomas, are subject to multiple recurrences throughout the course of the disease and represent a challenge for the neurosurgeon. Radiosurgery is increasingly performed for the treatment of Grade II meningiomas and is quite efficient in controlling relapses locally at the site of the lesion, but it cannot prevent margin relapses. The aim of this retrospective study was to analyze the technical parameters involved in producing marginal relapses and to optimize loco-marginal control to improve therapeutic strategy.

View Article and Find Full Text PDF

Irradiation plays an important role in the treatment of cancers of the head and neck providing a high locoregional tumor control and preservation of organ functions. External beam irradiation (EBI) results in unnecessary radiation exposure of the surrounding normal tissues increasing the incidence of side effects (xerostomy, osteoradionecrosis, and so forth). Brachytherapy (BT) seems to be the best choice for dose escalation over a short treatment period and for minimizing radiation-related normal tissue damage due to the rapid dose falloff around the source.

View Article and Find Full Text PDF

To assess efficacy and safety of hypofractionated radiation therapy (HRT) in patients over 80 years old with newly diagnosed glioblastoma (GBM). Between June 2009 and September 2015, patients in this population with a recommendation for radiation therapy from a multidisciplinary tumor board, and a Karnofsky performance status (KPS) ≥60 as assessed by a radiation oncologist, who received HRT (40 Gy/15 fractions) ± concomitant and adjuvant temozolomide (TMZ) were retrospectively analyzed. A total of 21 patients fulfilled the criteria for eligibility.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates how dosimetric factors relate to the occurrence of trigeminal neuropathy (TN) in patients receiving radiosurgery for vestibular schwannomas (VS).
  • It involved 179 patients without prior TN, analyzing various patient and treatment characteristics to identify predictors for TN development after surgery.
  • Key findings suggest that specific dosimetric parameters, such as the volume of the trigeminal nerve receiving high doses, are significant indicators for TN risk, and these should be prioritized in treatment planning.
View Article and Find Full Text PDF

Purpose: Chondrosarcoma is a rare malignant tumor of the cartilage affecting young adults. Surgery, followed by charged-particle irradiation, is considered the reference standard for the treatment of patients with grade I to II skull base chondrosarcoma. The present study was conducted to assess the effect of the quality of surgery and radiation therapy parameters on local control (LC) and overall survival (OS).

View Article and Find Full Text PDF

A PHP Error was encountered

Severity: Notice

Message: fwrite(): Write of 34 bytes failed with errno=28 No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 272

Backtrace:

A PHP Error was encountered

Severity: Warning

Message: session_write_close(): Failed to write session data using user defined save handler. (session.save_path: /var/lib/php/sessions)

Filename: Unknown

Line Number: 0

Backtrace: