Louise Lambert

• Centre hospitalier de l'Université de Montréal (CHUM)

Background: 5-FU-based chemoradiotherapy (CRT) could be associated with severe treatment-related toxicities in patients harboring at-risk DPYD polymorphisms. Methods: The studied population included consecutive patients with locoregionally advanced oropharyngeal carcinoma treated with carboplatin and 5-FU-based CRT one year before and after the imp...

Background Radiotherapy, along with laser surgery, is considered a standard treatment option for patients with early glottic squamous cell cancer (SCC). Historically, patients have received complete larynx radiotherapy (CL-RT) due to fear of swallowing and respiratory laryngeal motion and this remains the standard approach in many academic institut...

Purpose To assess cancer control and patient‐reported outcomes (PROs) after de‐intensified intensity‐modulated radiotherapy (IMRT) in lateralized p16‐associated oropharyngeal cancer (p16‐OPC). Methods Lateralized p16‐OPC treated with radiotherapy and concurrent Carboplatin/5‐fluorouracil between 2011 and 2014 were enrolled. De‐intensified IMRT con...

6580 Background: The combination of carboplatin and 5-fluorouracil (5-FU) is effective when used concurrently with radiotherapy for locoregionally advanced oropharyngeal carcinomas (Calais et al. 1999). DPYD polymorphisms can be associated with an increased risk of severe toxicity to fluoropyrimidines (Deenen et al. 2016). Upfront screening for the...

Purpose/objective(s): For non-operable stage I non-small cell lung cancer (NSCLC), stereotactic body radiation therapy (SBRT) has emerged as a standard treatment option. We aimed to compare the clinical outcomes of lung SBRT between patients with versus without pathological cancer diagnosis. Materials/methods: We included patients treated by SBR...

Background: Chemoradiotherapy used for the treatment of locally advanced head and neck cancer (HNC) causes a high incidence of mucositis that may be accentuated by a reactivation of herpes simplex virus (HSV). To date, no study has evaluated the impact of antivirals used as prophylaxis to prevent mucositis or their severity. Methods: This is a retr...

Background: SABR is a widely accepted treatment for early-stage lung cancer but there are safety concerns for central and ultra-central tumours. Herein we report our experience using risk-adapted fractionation (prescribed doses: 40-60 Gy in 3-8 fractions) with prioritization of dose to organs at risk. Methods: Patient declining or unsuitable for...

Background Radiation Therapy Oncology Group (RTOG)‐0129 recursive partitioning analysis was the basis for risk‐based therapeutic intensification trials for oropharyngeal cancer (OPC). To the authors’ knowledge, the question of whether RTOG‐0129 overall survival (OS) estimates for low‐risk, intermediate‐risk, and high‐risk groups are similar in othe...

Abstract Background The efficacy of immunotherapy targeting the PD-1/PD-L1 pathway has previously been demonstrated in metastatic head and neck squamous cell carcinoma (HNSCC). Stereotactic Body Radiotherapy (SBRT) aims at ablating metastatic lesions and may play a synergistic role with immunotherapy. The purpose of this study is to assess the safe...

Purpose To investigate the role of quantitative pre-treatment dual-energy computed tomography (DECT) for prediction of loco-regional recurrence (LRR) in patients with larynx/hypopharynx squamous cell cancer (L/H SCC). Methods Patients with L/H SCC treated with curative intent loco-regional radiotherapy and that underwent treatment planning with co...

Aim: To develop a tool in order to guide pre-irradiation dental care (PIDC) for patients with oropharyngeal cancers. Background: Osteoradionecrosis of the jaws is a potential complication of radiotherapy (RT) for head and neck cancers. To prevent this complication, PIDC can involve multiple dental extractions as a preventative measure to avoid p...

Objective: Chest wall (CW) toxicity (rib fracture and/or pain) is a recognized complication of stereotactic ablative radiotherapy (SABR) for non-small cell lung cancer (NSCLC). The aim of this study was to evaluate the frequency of CW toxicity following SABR and to propose a new dosimetric parameter. Methods: We reviewed the charts and SABR plan...

Purpose To quantify lung function based on a dual energy computed tomography (DECT)-derived iodine map in patients treated with radiotherapy for lung cancer, and to assess the dosimetric impact of its integration in radiotherapy planning. Methods Patients treated with stereotactic ablative radiotherapy (SABR) for early stage or intensity-modulated...

Introduction: To assess laryngeal motion in early glottic cancer in order to determine safe margins for partial larynx volumetric modulated arc therapy (PL-VMAT), and to quantify dosimetric advantages of PL-VMAT. Methods: This prospective study included T1-2N0 glottic cancers treated with whole larynx VMAT (WL-VMAT). Pre- and mid-treatment 4D-co...

Introduction: The purpose of this study is quantify intrafraction motion (IFM) during lung volumetric-modulated arc therapy (VMAT) and evaluate the impact of mid-treatment cone beam computed tomography (CBCT)-guided patient repositioning on target coverage. Method: This analysis included lung tumours treated with VMAT to 50-60 Gy in 3-5 fraction...

Purpose: Surgery remains the standard treatment for medically operable patients with early-stage non-small cell lung carcinoma (NSCLC). Following surgical resection, adjuvant chemotherapy is recommended for large tumors >4 cm. For unfit patients, stereotactic body radiation therapy (SBRT) has emerged as an excellent alternative to surgery. This stu...

Purpose: Incurable head and neck cancer is hard to manage with usual palliative care. Radiation therapy (RT) in this setting is sometimes omitted because there is an apprehension that the side effects in the head and neck region might counterbalance the benefits. The objective of this phase 2 study was to evaluate whether highly conformal RT could...

Purpose: To investigate the incidence and predictive factors of severe radiation pneumonitis (RP) after stereotactic ablative radiation therapy (SABR) in early-stage lung cancer patients with preexisting radiological interstitial lung disease (ILD). Methods and materials: A retrospective analysis of patients with stage I lung cancer treated with...

Background and Purpose: Stereotactic body radiotherapy (SBRT) for lung cancer accompanies a non-negligible risk of radiation pneumonitis (RP). This study presents a Bayesian network (BN) model that connects biological, dosimetric, and clinical RP risk factors. Material and Methods: 43 non-small-cell lung cancer patients treated with SBRT with 5 fra...

The purpose of this study was to prospectively evaluate the quality of life (QoL) and pulmonary function of patients with early-stage non-small cell lung cancer treated with robotic stereotactic ablative radiation therapy (SABR). Eligible patients all had histologically confirmed stage I non-small cell lung cancer and were not surgical candidates b...

Purpose: The objectives of this study are (1) to measure concordance of tumor position on breath-hold (BH) computed tomography (CT) scans relative to the natural tumor path during free breathing (FB) and (2) to evaluate the benefits of the breathing monitoring device Abches (Apex Medical, Tokyo) for stereotactic ablative radiotherapy (SABR) treatm...

Objective: The aim of this study is to identify clinical factors that are predictive of depression and quality of life (QOL) among long-term survivors of head and neck squamous cell carcinoma and to develop predictive scores using these factors. Study design: Cohort study Setting: Tertiary referral center. Subjects and methods: A total of 20...

Background: In comparison to sliding-window intensity-modulated radiation therapy (sw-IMRT), we hypothesized that helical tomotherapy (HT) would achieve similar locoregional control and, at the same time, decrease the parotid gland dose, thus leading to a xerostomia reduction. Methods: The association between radiation techniques, mean parotid d...

To determine which parameters allow for CyberKnife fiducial-less tumor tracking in stereotactic body radiation therapy (SBRT) for early-stage non-small cell lung cancer. A total of 133 lung SBRT patients were preselected for direct soft-tissue tracking based on manufacturer recommendations (peripherally located tumors ≥1.5 cm with a dense appearanc...

Background. RAS gene mutations have an impact on treatment response and overall prognosis for certain types of cancer. Objectives. To determine the prevalence and impact of K-RAS codons 12 and 13 mutations in patients with locally advanced HNSCC treated with primary or adjuvant chemo-radiation. Methods. 428 consecutive patients were treated with ch...

In patients with laryngeal cancer, pretreatment diagnosis of cartilage invasion often warrants a surgical or a bimodal treatment. Controversy exists on whether laryngeal cartilage sclerosis on computed tomography (CT) scan is a sign of tumor invasion. Our objective is to evaluate locoregional, laryngectomy-free, disease-specific, and overall surviv...

To determine the rates of organ preservation and function in patients with advanced laryngeal and hypopharyngeal carcinomas treated with concurrent chemoradiotherapy (CRT). Between April 1999 and September 2005, 82 patients with advanced laryngeal (67%) and hypopharyngeal carcinomas (33%) underwent conventional radiotherapy and concurrent platinum-...