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Dive into the research topics where John J. Dombrowski is active.

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Featured researches published by John J. Dombrowski.


Cancer | 2012

Hypofractionated stereotactic body radiotherapy in low-risk prostate adenocarcinoma: preliminary results of a multi-institutional phase 1 feasibility trial.

Sean M. McBride; Douglas S. Wong; John J. Dombrowski; Bonnie Harkins; Patricia Tapella; Heather N. Hanscom; Sean P. Collins; Irving D. Kaplan

Recent reports using extreme hypofractionated regimens in the treatment of low‐risk prostate adenocarcinoma have been encouraging. Here, the authors report on their own multi‐institutional experience with extreme hypofractionated stereotactic radiotherapy for early stage disease.


Head and Neck-journal for The Sciences and Specialties of The Head and Neck | 2016

Esthesioneuroblastoma with bilateral metastases to the parotid glands

Adnan S. Hussaini; John J. Dombrowski; E. Stephen Bolesta; Ronald J. Walker; Mark A. Varvares

Esthesioneuroblastoma (ENB) is a rare, poorly characterized, intranasal cancer arising from olfactory neuroepithelium.


Oral Oncology | 2018

Oncologic and functional outcomes of pretreatment tracheotomy in advanced laryngeal squamous cell carcinoma: A multi-institutional analysis

Serena A. Byrd; Mary J. Xu; Lauren M. Cass; Daniel J. Wehrmann; Matthew R. Naunheim; Kara M. Christopher; John J. Dombrowski; Ronald J. Walker; Lori J. Wirth; John R. Clark; Paul M. Busse; Annie W. Chan; Daniel G. Deschler; Kevin S. Emerick; Derrick T. Lin; Mark A. Varvares

OBJECTIVES Describe the influence of pretreatment tracheotomy and treatment modality (surgical versus non-surgical) on oncologic and functional outcomes. MATERIALS AND METHODS Retrospective study of previously untreated advanced-stage laryngeal squamous cell carcinoma patients at two academic tertiary care institutions from 1995 to 2014. RESULTS Primary outcomes evaluated were disease-free survival, disease-specific survival, and overall survival of pretreatment tracheotomy versus no pretreatment tracheotomy cohorts. Functional status, measured by tracheotomy decannulation and gastrostomy tube placement/removal, was assessed. Of the 226 patients, 31.4% underwent pretreatment tracheotomy. Five-year disease-specific survival was 72.9%, and overall survival was 48.8% for entire cohort. There was a statistically significant decrease in overall survival (p = .03) and disease-free survival (p = .02) for the pretreatment tracheotomy group compared to no pretreatment tracheotomy, which was largely explained by primary tumor stage. Pretreatment tracheotomy was associated with gastrostomy tube placement and was an independent predictor of worse odds of gastrostomy tube removal. Disease stage, distant metastasis, and age independently conferred worse odds of gastrostomy tube removal. CONCLUSION Patients undergoing pretreatment tracheotomy for primary T4 laryngeal cancer had decreased overall survival compared to patients without pretreatment tracheotomy. There was no difference in local recurrence rates based on tracheotomy status. Organ preservation with chemotherapy and radiation did not result in better functional outcomes than surgery in the pretreatment tracheotomy group as nearly half of patients treated with organ preservation remained tracheotomy dependent. Based on this data, pretreatment tracheotomy may impact oncologic and functional outcomes in advanced disease, and it should be a consideration in an informed decision-making process.


Laryngoscope | 2018

Radiation and Second Primary Thyroid Cancer Following Index Head and Neck Cancer: Thyroid Cancer After Index HNC

Katherine M. Polednik; Matthew C. Simpson; Eric Adjei Boakye; Kahee A. Mohammed; John J. Dombrowski; Mark A. Varvares; Nosayaba Osazuwa-Peters

Radiation is thought to increase risk of developing second primary thyroid cancer (SPTC). This study estimated the rate of SPTC following index head and neck cancer (HNC) and determined whether radiation treatment among HNC survivors increased SPTC risk.


Journal of Gastrointestinal Cancer | 2017

Correction to: Hepatocellular Carcinoma with Bone Metastases: Incidence, Prognostic Significance, and Management—Single-Center Experience

Ruchi Bhatia; Sravanthi Ravulapati; Alex S. Befeler; John J. Dombrowski; S. Gadani; Nishant Poddar

The original version of this article unfortunately contained a mistake in the Author group section. Author first names and family names were interchanged.


International Journal of Radiation Oncology Biology Physics | 2018

Multicenter Trial of Stereotactic Body Radiation Therapy for Low- and Intermediate-Risk Prostate Cancer: Survival and Toxicity Endpoints

R. Meier; Daniel A. Bloch; Cristian Cotrutz; Alan C. Beckman; G. Henning; S.A. Woodhouse; S. Williamson; Najeeb Mohideen; John J. Dombrowski; R.L. Hong; David Brachman; Patrick W. Linson; Irving D. Kaplan


International Journal of Radiation Oncology Biology Physics | 2018

Predictive Factors for Urinary Toxicity from a Multi-Center Trial of Stereotactic Body Radiation Therapy for Prostate Cancer

R. Meier; A. Beckman; G. Henning; S.A. Woodhouse; S. Williamson; Najeeb Mohideen; John J. Dombrowski; R.L. Hong; P.W. Linson; Irving D. Kaplan


Journal of Gastrointestinal Cancer | 2017

Hepatocellular Carcinoma with Bone Metastases: Incidence, Prognostic Significance, and Management—Single-Center Experience

Ruchi Bhatia; Sravanthi Ravulapati; Alex S. Befeler; John J. Dombrowski; S. Gadani; Nishant Poddar


Journal of Clinical Oncology | 2017

Incidence of esophageal and head and neck cancers among breast cancer survivors in the United States.

Krista Dollar; Albina Tyker; Matthew C. Simpson; Eric Adjei Boakye; John J. Dombrowski; Mark A. Varvares; Nosayaba Osazuwa-Peters


Journal of Clinical Oncology | 2016

Hepatocellular carcinoma with bone metastases: Incidence, prognostic significance and management—Single center experience.

Ruchi Bhatia; Sravanthi Ravulapati; Alex S. Befeler; John J. Dombrowski; S. Gadani; Nishant Poddar

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Irving D. Kaplan

Beth Israel Deaconess Medical Center

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Mark A. Varvares

Massachusetts Eye and Ear Infirmary

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S. Gadani

Saint Louis University

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