Publications by authors named "Laskar S"

Objectives: To address controversies regarding target volume delineation for adjuvant intensity-modulated radiation therapy for oral cavity squamous cell carcinoma with pedicled flap reconstruction and elective nodal irradiation (ENI).

Materials And Methods: During target volume delineation, the primary tumor bed was the pre-surgical gross tumor volume with an additional isotropic margin of 5-10 mm. Additionally, the flap and body tissue junction were given a margin of 5-10 mm (if not already given).

View Article and Find Full Text PDF

Background: The aim of this study was to document the incidence, spectrum and outcomes of Second Primary Malignancy (SPM) in a prospectively followed-up population of Head and Neck Squamous carcinoma (HNSCC) patients accrued in six prospective trials and treated with definitive radiotherapy.

Materials And Methods: Patients were prospectively followed up over time and data on SPM collected after IRB approval after establishing the diagnosis of SPM based on clinical criteria. Descriptive statistics to determine clinic demographic characteristics and spectrum of SPM encountered, time to event outcomes (SPM-DFS - Disease-free survival after diagnosis of second primary, SPM-OS - Overall survival after diagnosis of second primary) and univariate analysis of factors of likely prognostic significance were performed.

View Article and Find Full Text PDF
Article Synopsis
  • This study explores automated methods for assessing the accuracy of beam delivery in Pencil Beam Scanning (PBS) proton therapy using irradiation log files and machine learning (ML) models.
  • By analyzing 935 clinical treatment fields, the research found over 99.5% accuracy in spot positions and ML models effectively predicted spot sizes within 10% of expected baselines.
  • The proposed automation methods can enhance quality assurance processes and provide a faster alternative for patient-specific QA and routine evaluations in proton therapy.
View Article and Find Full Text PDF
Article Synopsis
  • - The study aimed to assess whether it is possible to protect the structures involved in swallowing and aspiration (DARS) during radiation therapy for head and neck cancer, while still effectively treating the tumors.
  • - Researchers outlined specific target areas and dose limits for DARS in 35 patients, finding that the average dose received by these critical structures varied depending on the type of cancer and the size of the tumor volume.
  • - Results indicated that sparing DARS was more difficult for patients with oropharyngeal cancers compared to laryngopharyngeal cancers, but it was achievable when the tumor volume was less than 150 cc or in patients with no or only one affected lymph node.
View Article and Find Full Text PDF

Background: This study reports the psychometric properties of OUTPASAT-35RT questionnaire from a large Indian cancer cohort treated with ambulatory radiotherapy (RT) at a tertiary-care comprehensive cancer center.

Materials And Methods: Adults with a pathologically proven diagnosis of cancer undergoing fractionated RT (≥10 fractions) with the ability to read and understand English, Hindi, or Marathi were accrued after written informed consent. Patients were administered a language-appropriate version of OUTPATSAT-35RT along with European Organization for Research and Treatment of Cancer (EORTC) generic quality-of-life questionnaire (QLQ-C30) at conclusion of RT (±3 days).

View Article and Find Full Text PDF
Article Synopsis
  • Juvenile myoclonic epilepsy (JME) is a genetic generalized epilepsy syndrome that is generally well-controlled, but long-term outcomes can vary due to related personality traits and psychiatric disorders; quality of life (QoL) information in adolescents with JME is limited.
  • This study involved 50 participants aged over 11 years, who were assessed using specific quality of life questionnaires (QOLIE-AD-48 for adolescents and QOLIE-31-P for adults) and screened for psychiatric disorders, to understand the impact on their overall quality of life.
  • Results showed that while the overall QoL scores were fair for both adults (62.29) and adolescents (69.71), specific areas such
View Article and Find Full Text PDF

Background: Virtual surgical planning (VSG), also known as computer-assisted reconstruction, has started to become the norm for more complex patients in many centers in recent times.

Aim: This study was conducted to evaluate the VSG in maxillofacial reconstruction surgery.

Methods And Materials: This study included 20 patients who underwent surgery for maxillofacial reconstruction.

View Article and Find Full Text PDF

Background: The care of adolescents and young adults (AYAs) with bone sarcomas involves unique challenges. The objectives of this study were to identify challenges and evaluate long-term outcomes of these patients from India who received treatment with novel protocols.

Methods: This prospective cohort study included AYA patients (aged 15-39 years) with osteosarcoma and Ewing sarcoma (ES), who were treated uniformly at the authors' institute using unique protocols (OGS-12 and EFT-2001) from 2011 to 2021 and from 2013 to 2018, respectively.

View Article and Find Full Text PDF

Aims: Over the past two decades, significant progress has been made in the development of quality indicators (QIs) within the field of radiotherapy (RT). However, most of the literature has predominantly focused on process and outcome-related QIs, with limited attention given to structural QIs. This review aims to address this gap by providing insights into structural QIs in RT and examining the complexities and considerations involved in establishing universal standards for these indicators across RT facilities globally.

View Article and Find Full Text PDF

Transparent and precise endpoint definitions are a crucial aspect of clinical trial conduct and reporting, and are used to communicate the benefit of an intervention. Previous studies have identified inconsistencies in endpoint definitions across oncological clinical trials. Here, the Head and Neck Cancer International Group assessed endpoint definitions from phase 3 trials or trials considered practice-changing for patients with recurrent or metastatic mucosal head and neck squamous cell carcinoma, published between 2008 and 2021.

View Article and Find Full Text PDF

Background: Multiple differentials exist for pediatric liver tumors under 2 years. Accurate imaging diagnosis may obviate the need for tissue sampling in most cases.

Objective: To evaluate the imaging features and diagnostic accuracy of computed tomography (CT) in liver tumors in children under 2 years.

View Article and Find Full Text PDF

Purpose: Desmoid fibromatosis (DF) is a locally aggressive tumor with low mortality but significant morbidity. There is a lack of standard of care, and existing therapies are associated with significant barriers including access, cost, and toxicities. This study aimed to explore the efficacy and safety of the metronomic therapy (MT) in DF in a large, homogenous cohort from India.

View Article and Find Full Text PDF

Utilising Machine Learning (ML) models to predict dosimetric parameters in pencil beam scanning proton therapy presents a promising and practical approach. The study developed Artificial Neural Network (ANN) models to predict proton beam spot size and relative positional errors using 9000 proton spot data. The irradiation log files as input variables and corresponding scintillation detector measurements as the label values.

View Article and Find Full Text PDF

Background: A water-soluble ingredient of mature leaves of the tropical mahogany 'Neem' (Azadirachta indica), was identified as glycoprotein, thus being named as 'Neem Leaf Glycoprotein' (NLGP). This non-toxic leaf-component regressed cancerous murine tumors (melanoma, carcinoma, sarcoma) recurrently in different experimental circumstances by boosting prime antitumor immune attributes. Such antitumor immunomodulation, aid cytotoxic T cell (T)-based annihilation of tumor cells.

View Article and Find Full Text PDF

Background Objectives: The role of consolidation radiation therapy (CRT) after complete metabolic response to chemotherapy in advanced-stage (stage III and IV) Hodgkin lymphoma (HL) is controversial. This study was undertaken to assess the clinical outcomes in terms of event free survival, local failure free survival and overall survival in individuals with advanced HL treated with chemotherapy and CRT.

Methods: A retrospective review was conducted to study the long-term clinical outcomes in individuals diagnosed with HL and treated with chemotherapy and CRT from 2012 to 2016 at a tertiary cancer care hospital in India.

View Article and Find Full Text PDF

Background: The efficacy of extracorporeal membrane oxygenation (ECMO) as a bridge to left ventricular assist device (LVAD) remains unclear, and recipients of the more contemporary HeartMate 3 (HM3) LVAD are not well represented in previous studies. We therefore undertook a multicenter, retrospective study of this population.

Methods And Results: INTERMACS 1 LVAD recipients from five U.

View Article and Find Full Text PDF

It is of interest to compare conventional lateral window technique, trans-alveolar technique with minimally invasive technique like modified trephine technique and antral membrane balloon elevation technique for sinus floor elevation in placement of dental implants. The current study included 140 participants (191 dental implants) who had maxillary posterior edentulous regions and had low sinuses and insufficient alveolar ridges but had chosen an implant-retained prosthesis. The minimally invasive techniques of sinus augmentation can be suitable alternative to conventional traumatic techniques due to low incidence of pain, gingival swelling.

View Article and Find Full Text PDF

Objectives: This study aims to evaluate the role of pretherapy MRI in predicting outcomes in carotid body tumors and propose a grading system for high- and low-risk characteristics.

Materials And Methods: A retrospective observational study of 44 patients with 51 lesions was carried out from year 2005 to 2020. MR images were reviewed for characteristics of carotid body tumor, and a score was given that was correlated with intra- and postoperative findings.

View Article and Find Full Text PDF
Article Synopsis
  • High-grade B-cell non-Hodgkin lymphomas (NHLs) are more prevalent in patients with HIV, and this study reflects on the treatment outcomes of such patients treated with a specific chemotherapy regimen called DA-EPOCH(+/-R) from 2011 to 2015.
  • The analysis included 40 patients with various types of B-cell NHL, and a notable 82.5% had a 5-year overall survival rate, indicating the regimen's effectiveness.
  • While most patients experienced significant side effects, such as febrile neutropenia and mucositis, the treatment remains a viable option even for those with serious health challenges related to HIV.
View Article and Find Full Text PDF

Background: Neoadjuvant chemotherapy (NACT) with TPF (docetaxel, cisplatin, and 5FU) is one of the treatment options in very locally advanced oral cancer with a survival advantage over PF (cisplatin and 5FU). TP (docetaxel and cisplatin) has shown promising results with a lower rate of adverse events but has never been compared to TPF.

Methods: In this phase 3 randomized superiority study, adult patients with borderline resectable locally advanced oral cancers were randomized in a 1:1 fashion to either TP or TPF.

View Article and Find Full Text PDF

Purpose: This study aimed to evaluate the volumetric and geometric changes in the parotid glands and target volume during image-guided radiotherapy (IGRT) for locally advanced oropharyngeal cancers.

Materials And Methods: Twenty patients receiving radiotherapy using IGRT at a dose of 70 Gy/35 fractions/7 weeks for locally advanced oropharyngeal cancers were accrued. Radiotherapy planning computed tomography (CT) scans were performed at pre-radiotherapy (RT), 20, 40, and 60 Gy for each patient.

View Article and Find Full Text PDF

This study's objective was to compare detection rates of radiograph, computed tomography (CT), and positron emission tomography-contrast-enhanced computed tomography (PET-CECT) for pulmonary metastasis/synchronous primary lung tumors in head and neck squamous cell cancer (HNSCC) and its association with clinico-radio-pathological factors. Our retrospective study included 837 HNSCC patients from January 2012 to December 2017. Lung nodules were characterized on CT as benign, indeterminate, and metastatic.

View Article and Find Full Text PDF

Introduction: Fifty per cent of patients with cancer require radiotherapy during their disease course, however, only 10%-40% of patients in low-income and middle-income countries (LMICs) have access to it. A shortfall in specialised workforce has been identified as the most significant barrier to expanding radiotherapy capacity. Artificial intelligence (AI)-based software has been developed to automate both the delineation of anatomical target structures and the definition of the position, size and shape of the radiation beams.

View Article and Find Full Text PDF

Background: Neo-adjuvant chemotherapy (NACT) followed by response assessment is the standard treatment algorithm for locally advanced oral cavity squamous cell carcinomas (OCSCC) in the Indian subcontinent. The 3-drug NACT regimen (Docetaxel-Cisplatin-5-FU) has shown improvement in overall survival over 2-drug regimen (Docetaxel-Cisplatin) in a phase-3 randomised study. We have analysed the 10-year outcomes with this treatment algorithm.

View Article and Find Full Text PDF