Publications by authors named "Amin J Mirhadi"

Purpose: The COVID-19 pandemic disrupted medical care. Little is known about how radiation therapy (RT) ordering behavior changed during the pandemic. This study examined (1) whether there was a change in the rate at which orders for lumpectomy were followed by orders for RT and (2) whether there was a change in the percentage of RT orders for hypofractionated (HF) RT rather than conventionally fractionated (CF) RT.

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Purpose: Prior data have demonstrated relationships between patient characteristics, the use of surgery to treat lung cancer, and the timeliness of treatment. Our study examines whether these relationships were observable in 2019 in patients with Medicare Advantage health plans being treated for lung cancer.

Methods: Claims data pertaining to patients with Medicare Advantage health plans who had received radiation therapy (RT) or surgery to treat lung cancer within 90 days of diagnostic imaging were extracted.

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Introduction: Lung cancer is treated using systemic therapy, radiation therapy (RT), and surgery. This study evaluates how utilization of these modalities and cancer stage at initial treatment shifted from 2019 to 2021.

Methods: Claims for lung cancer treatment were extracted from the database of a national health care organization offering Medicare Advantage health plans and paired with enrollment data to determine utilization rates.

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Background: When a physician determines that a patient needs radiation therapy (RT), they submit an RT order to a prior authorization program which assesses guideline-concordance. A rule-based clinical decision support system (CDSS) evaluates whether the order is appropriate or potentially non-indicated. If potentially non-indicated, a board-certified oncologist discusses the order with the ordering physician.

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Purpose: The virtual tumor board (VTB) is a multidisciplinary group of specialist physicians who remotely educate the treating physician on the development of an evidence-based cancer treatment plan that will enhance patient outcomes according to the available literature. The use of hypofractionated (HF) radiation therapy (RT) is a preferred approach according to National Comprehensive Cancer Network guidelines and is encouraged by the VTB, when appropriate.

Materials And Methods: An observational, cohort study using prior authorization and claims data were conducted to show how the relative use of HF and conventional fractionated (CF) RT changed after the implementation of the VTB.

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Purpose: Brachytherapy (BT) after surgical resection of keloids reduces the risk of local recurrence, but standardization of dose/technique is lacking. Typical keloid BT treatment utilizes a single-channel source prescribed to 5-mm depth. We investigated the dosimetry of a volume-based target definition for interstitial high-dose-rate BT treatment of keloids.

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Purpose: Although there is some evidence to support the use of hypofractionated (HF) radiation therapy (RT) postmastectomy, it is not currently the standard of care. RT noncompletion and delayed completion have been shown to lead to inferior outcomes. This study assesses the association between the choice of an HF versus conventionally fractionated regimen and completion.

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Background: As Medicare expands the use of computed tomography (CT) for diagnosing lung cancer, there is increased opportunity to diagnose lung cancer in asymptomatic patients. This descriptive study characterizes the disease-specific diagnostic and treatment services that patients with a positive diagnosis following CT received, stratified by presentation at CT.

Methods: Patients who were diagnosed with lung cancer following CT in 2013, had no history of lung cancer, survived at least 1 year, were aged 55-80 years, and had Medicare Advantage insurance were included.

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Purpose: NRG Oncology RTOG 9202 was a randomized trial testing long-term adjuvant androgen deprivation (LTAD) versus initial androgen deprivation only (STAD) with external beam radiation therapy (RT) in mostly high-risk and some intermediate-risk prostate cancer patients. RTOG 9408 found an overall survival (OS) advantage in patients with cT1b-T2b disease and prostate-specific antigen (PSA) <20 ng/mL, with benefit observed mostly among intermediate-risk patients. It was still unknown whether intermediate-risk patients would experience an additional survival benefit with LTAD; thus, we performed a secondary analysis to explore whether LTAD had any incremental benefit beyond STAD among the intermediate-risk subset of RTOG 9202.

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Radiation therapy continues to expand its role in the management of bladder cancer. Utilization of chemoradiation as part of the management increases the likelihood of keeping the native bladder and has a positive impact on quality of life, without compromising cure. There remains sustained interest in the concept of bladder conservation as an organ-sparing approach that is potentially equivalent to radical cystectomy as regards disease-specific survival.

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The role of radiation therapy in the management of muscle-invasive bladder cancer has evolved tremendously over the past several decades. Early on, radiation therapy alone was utilized as the preferred method of bladder preservation. Unfortunately, the results with this approach have been suboptimal.

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Management options for localized prostate cancer include radical prostatectomy (RP), radiation therapy (external-beam radiation therapy [EBRT] or brachytherapy), with and without androgen-deprivation therapy (ADT), or active surveillance, also known as watchful waiting. Ultimately, the choice of treatment is determined by a variety of factors, including institutional preference, individual physician judgment, patient preference, and resource availability. In this editorial, we make the case for radiation therapy (EBRT or brachytherapy) as the management modality of choice for localized prostate cancer.

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