Publications by authors named "Daniel A Hamstra"

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Phase 3 Trial of Dose-Escalated Radiation Therapy and Standard Androgen Deprivation Therapy Versus Dose-Escalated Radiation Therapy and Enhanced Androgen Deprivation Therapy With Orteronel for Men With High-Risk Prostate Cancer (NRG/RTOG 1115).
Daniel A Hamstra, James J Dignam, Deborah W Bruner, M Dror Michaelson, François Bachand

Int J Radiat Oncol Biol Phys· December 2025

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To Space or Not to Space: The EPIC Question for Prostate Stereotactic Radiotherapy (SBRT) with or without Hydrogel Rectal Spacer (RS).
Madeline M Flanagan, Mhd Hasan Almekdash, Sean P Collins, Brian Collins, Simeng Suy, Daniel A Hamstra

Pract Radiat Oncol· December 2025

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Association Between Rectal Spacer Use and Erectile Dysfunction Diagnosis Among Men Receiving Prostate Radiotherapy: US County-Level Analysis.
Ryan Hankins, Sean P Collins, Ryoko Sato, Parthiv Mehta, Samir Bhattacharyya, Daniel A Hamstra

Cancer Med· December 2025

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Association between rectal spacer use and bowel, urinary, and sexual dysfunction following prostate cancer brachytherapy: U.S. claims data analysis.
Michael R Folkert, Emily S Weg, Ryoko Sato, James B Yu, Samir Bhattacharyya, Daniel A Hamstra

Brachytherapy· December 2025

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Rectal spacer use and overall long-term healthcare costs: payer perspective.
James B Yu, Ryoko Sato, Michael R Folkert, Samir Bhattacharyya, Emmanuel Ezekekwu, Daniel A Hamstra

Front Oncol· September 2025

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Rectal spacer use and bowel, urinary, and sexual dysfunction diagnosis and related procedures among men receiving prostate radiotherapy: US county-level analysis.
James B Yu, Michael R Folkert, Ryoko Sato, Sean Collins, Ryan Hankins, Daniel A Hamstra

World J Urol· July 2025

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Bowel Disorder Incidence and Rectal Spacer Use in Patients With Prostate Cancer Undergoing Radiotherapy.
Michael R Folkert, Ryoko Sato, James B Yu, Danielle Vannan, Samir Bhattacharyya, Daniel A Hamstra

JAMA Netw Open· March 2025

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Postprostatectomy Radiotherapy Timing and Long-Term Health-Related Quality of Life.
Sagar A Patel, Dattatraya Patil, Joseph Smith, Christopher S Saigal, Mark S Litwin, Daniel A Hamstra

JAMA Netw Open· October 2024

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Apparent diffusion coefficient values predict response to brachytherapy in bulky cervical cancer.
Elizabeth E Dong, Junqian Xu, Joo-Won Kim, Jason Bryan, Jewel Appleton, Daniel A Hamstra

Radiat Oncol· March 2024

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A pooled long-term follow-up after radiotherapy for prostate cancer with and without a rectal hydrogel spacer: impact of hydrogel on decline in sexual quality of life.
Zachary A Seymour, Michael Pinkawa, Stephanie Daignault-Newton, Walter Bosch, Jeff M Michalski, Daniel A Hamstra

Front Oncol· October 2023

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Stereotactic Body Radiation Therapy vs Surgery for Early-Stage Non-Small Cell Lung Cancer: Does the Dealer Influence the Choice?
Mohammad Jafferji, Daniel A Hamstra, Shawn S Groth

Ann Thorac Surg· February 2023

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Predictors of follow-up non-compliance after definitive radiotherapy for locally advanced cervical cancer at a community cancer center.
Lucas G Sapienza, Justin J Thomas, Alfredo E Echeverria, Shelly Sharma, Daniel A Hamstra

Gynecol Oncol Rep· December 2022

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Patient reported outcomes for quality of life (QOL) by Expanded Prostate Cancer Index (EPIC) on average 15 years post treatment.
Zachary A Seymour, Stephanie Daignault-Newton, P W McLaughlin, Howard Sandler, William Jackson, Daniel A Hamstra

Clin Transl Radiat Oncol· September 2022

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Co-Inhibition of Androgen Receptor and PARP as a Novel Treatment Paradigm in Prostate Cancer-Where Are We Now?
Arpit Rao, Nagaishwarya Moka, Daniel A Hamstra, Charles J Ryan

Cancers (Basel)· February 2022

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Patient-Reported Quality of Life During Prostate Cancer Radiation Therapy: Insights Into the Patient Experience.
Jacob S Parzen, Daniel A Hamstra

Int J Radiat Oncol Biol Phys· July 2021

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Who Benefits From a Prostate Rectal Spacer? Secondary Analysis of a Phase III Trial.
Thomas J Quinn, Stephanie Daignault-Newton, Walter Bosch, Neil Mariados, John Sylvester, Daniel A Hamstra

Pract Radiat Oncol· December 2020

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Rectal Spacer Usage with Proton Radiation Therapy for Prostate Cancer.
Andrew B Thompson, Daniel A Hamstra

Int J Radiat Oncol Biol Phys· November 2020

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Long-term follow-up after radiotherapy for prostate cancer with and without rectal hydrogel spacer: a pooled prospective evaluation of bowel-associated quality of life.
Zachary A Seymour, Daniel A Hamstra, Stephanie Daignault-Newton, Walter Bosch, Jeffery Michalski

BJU Int· September 2020

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Local control matters.
Ronald B Levitin, Daniel A Hamstra

Transl Androl Urol· June 2020

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Trimodality therapy for atypical teratoid/rhabdoid tumor is associated with improved overall survival: A surveillance, epidemiology, and end results analysis.
Thomas J Quinn, Muayad F Almahariq, Zaid A Siddiqui, Andrew B Thompson, Daniel A Hamstra

Pediatr Blood Cancer· December 2019

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Gleason pattern 5 is associated with an increased risk for metastasis following androgen deprivation therapy and radiation: An analysis of RTOG 9202 and 9902.
Daniel A Hamstra, Stephanie L Pugh, Herbert Lepor, Seth A Rosenthal, Kenneth J Pienta

Radiother Oncol· December 2019

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Spinal Growth Patterns After Craniospinal Irradiation in Children With Medulloblastoma.
Skyler B Johnson, Jonathon Hung, Nirav Kapadia, Kevin S Oh, Michelle Kim, Daniel A Hamstra

Pract Radiat Oncol· January 2019

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Time Interval to Biochemical Failure as a Surrogate End Point in Locally Advanced Prostate Cancer: Analysis of Randomized Trial NRG/RTOG 9202.
James J Dignam, Daniel A Hamstra, Herbert Lepor, David Grignon, Harmar Brereton

J Clin Oncol· January 2019

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Patient-Reported Sexual Aid Utilization and Efficacy After Radiation Therapy for Localized Prostate Cancer.
Robert T Dess, Theresa P Devasia, Nima Aghdam, William C Jackson, Payal D Soni, Daniel A Hamstra

Int J Radiat Oncol Biol Phys· June 2018

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In Regard to Jang et al.
Daniel A Hamstra

Int J Radiat Oncol Biol Phys· April 2018

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