Publications by authors named "Gopal Bajaj"

Purpose: Human Papilloma Virus (HPV)-associated oropharyngeal squamous cell carcinoma (OPSCC) is a distinct disease from other head and neck tumors. This guideline provides evidence-based recommendations on the critical decisions in its curative treatment, including both definitive and postoperative radiation therapy (RT) management.

Methods: ASTRO convened a task force to address 5 key questions on the use of RT for management of HPV-associated OPSCC.

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Article Synopsis
  • The study aimed to assess patient-specific quality assurance (PSQA) for three targets using a new spherical film-based phantom designed for simultaneous measurements.
  • Fifteen test plans were implemented using the CyberKnife system, applying both automatic and marker-based registration methods to analyze the irradiated films with high gamma analysis passing rates.
  • The novel phantom demonstrated good PSQA results, confirming its effectiveness for robotic radiosurgery and marking a significant advance in concurrent targeting assessments on the CyberKnife system.
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Purpose: Outpatient care for patients with cancer compromises 60% to 70% of health care costs during the last 6 months of life. Recent approvals for expensive biologics and growing support for lower-cost hypofractionated radiation therapy in the palliative management of advanced cancer have introduced offsetting spending effects on end-of-life care that may shift overall expenditures for this patient cohort.

Methods And Materials: In this descriptive retrospective cohort study, end-of-life care is defined as the aggregate of medical services and supplies, including drugs, furnished to patients with cancer in the outpatient setting during the last 6 months of life.

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oronavirus (COVID-19) has caused marked impact on graduate medical education for all medical specialties. Radiation Oncology and the American Board of Radiology have also had to rapidly adapt to converting education and examinations to virtual platforms. We describe our small pilot experience in transitioning our in-person mock oral examinations to a virtual platform.

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Purpose: The proposed Radiation Oncology Alternative Payment Model (RO-APM) released on July 10, 2019, represents a dramatic shift from fee-for-service (FFS) reimbursement in radiation therapy (RT). This study compares historical revenue at Mayo Clinic to the RO-APM and quantifies the effect that disease characteristics may have on reimbursement.

Methods And Materials: FFS Medicare reimbursements were determined for patients undergoing RT at Mayo Clinic from 2015 to 2016.

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Purpose: To present evidence-based guidelines for the treatment of oropharyngeal squamous cell carcinoma (OPSCC) with definitive or adjuvant radiation therapy (RT).

Methods And Materials: The American Society for Radiation Oncology convened the OPSCC Guideline Panel to perform a systematic literature review investigating the following key questions: (1) When is it appropriate to add systemic therapy to definitive RT in the treatment of OPSCC? (2) When is it appropriate to deliver postoperative RT with and without systemic therapy following primary surgery for OPSCC? (3) When is it appropriate to use induction chemotherapy in the treatment of OPSCC? (4) What are the appropriate dose, fractionation, and volume regimens with and without systemic therapy in the treatment of OPSCC?

Results: Patients with stage IV and stage T3 N0-1 OPSCC treated with definitive RT should receive concurrent high-dose intermittent cisplatin. Patients receiving adjuvant RT following surgical resection for positive surgical margins or extracapsular extension should be treated with concurrent high-dose intermittent cisplatin, and individuals with these risk factors who are intolerant of cisplatin should not routinely receive adjuvant concurrent systemic therapy.

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Background: Nasopharyngeal carcinoma with leptomeningeal involvement is rare and typically has poor prognosis.

Methods And Results: We present a case report of a patient with nasopharyngeal carcinoma who was treated with high-dose intravenous methotrexate and remains asymptomatic and without clinical evidence of disease 6 years later.

Conclusions: Systemic high-dose methotrexate should be evaluated in the treatment of advanced nasopharyngeal carcinoma with central nervous involvement.

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Authors discuss laryngeal lesions, metastases, and relevant anatomy. Outcome of surgical and radiotherapy in terms of voice preservation is discussed. Radiation techniques and outcomes for laryngeal cancer are presented along with discussion of interdisciplinary treatment.

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Radiation treatment of scalp malignancies can be a challenge due to the multiple curved surfaces to which homogenous dose must be delivered. The most readily available techniques utilize linear accelerator-based technique of opposed lateral electron field abutting opposed lateral photon field with central blocking. Bolus material is used to achieve adequate skin dose.

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Objectives: Patients with biochemical recurrence of prostate cancer after definitive or salvage local therapy in the absence of metastatic disease represent a group well suited to a novel therapeutic intervention. Imatinib mesylate (Gleevec) is a protein-tyrosine kinase inhibitor that has previously been tested in men with androgen-independent and metastatic prostate cancer. This Phase II study was undertaken to determine the safety and efficacy of imatinib mesylate in men with biochemical relapse of nonmetastatic, androgen-sensitive prostate cancer after local therapy.

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Objective: To determine a plan for the management of cervical lymph nodes in patients undergoing salvage laryngeal surgery (SLS) for recurrent/persistent laryngeal cancer after primary radiotherapy (RT).

Study Design: : Retrospective chart review.

Methods: Charts of 51 consecutive patients who had salvage total or supracricoid laryngectomy with or without neck dissection for recurrent/persistent laryngeal squamous cell carcinoma after primary RT from 1988 to 2005 in our institution were reviewed.

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The multimodality management of brain metastases has undergone significant refinement in the last decade. Although brain metastases remain a significant source of morbidity and mortality for many cancer patients, aggresive management has led to pronounced gains in neurological functioning, disease free survival and overall survival compared to standard treatment regimens consisting of only whole brain radiation therapy. Representative studies reviewing the role of aggressive management approaches including surgical resection with or without whole brain radiation therapy or non-surgical approaches employing stereotactic radiosurgery alone or in combination with whole brain radiation therapy are highlighted.

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Over the past 2 decades, breast-conservation therapy with lumpectomy and whole-breast radiotherapy has become a standard option for the majority of women with newly diagnosed breast cancer. Long-term local control is achieved in approximately 85% of patients, and the therapy is generally well tolerated. There can, however, be long-term effects on the breast and other nearby tissues that may range from asymptomatic findings on examination to severe, debilitating problems.

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