Faculty profile

Brian O'Sullivan

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ProfessorDepartment of Radiation OncologyUniversity of Toronto

Brian O'Sullivan

Professor

Department of Radiation Oncology

Temerty Faculty of Medicine

University of Toronto

Toronto, Ontario, Canada

Supervision signals

Professors usually supervise graduate students in their department's programs.
68 publications in the last five years, latest in 2026.
Senior (last) author on 6 recent papers, a sign of leading a research group.

These signals come from public records, including federal and provincial funding decisions. Ask the professor or the graduate program whether they are taking new students.

Academic metrics

252

Publications

11,527

Citations

159

Collaborators

Grants

Publications by year

Counts cover the publications linked to this profile. Citations and the h-index appear when the source records them.

Profiles and links

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Signals and details

Research

Read how they describe their research on their University of Toronto profile.

Latest papers

Prognostic Factors in Sinonasal Cancers: A Multicenter Pooled Analysis.
The Laryngoscope · 2026
Reduction of Bone Fracture After Radiation Therapy in Lower Extremity Soft Tissue Sarcoma After Implementing Bone Avoidance Objectives for Radiation Therapy Planning.
International journal of radiation oncology, biology, physics · 2026
Impact of metastasis-directed therapy for metachronous thoracic metastases following definitive (chemo)radiotherapy in p16-positive head and neck squamous cell carcinoma.
Oral oncology · 2026

All 252 publications

Latest funding

Is the improvement in survival for HPV associated head and neck cancer due to the addition of chemotherapy to radiotherapy or to a more treatment-sensitive cancer?
CIHR · 2010 · Co-investigator
$590,526
Is the improvement in survival for HPV associated head and neck cancer due to the addition of chemotherapy to radiotherapy or to a more treatment-sensitive cancer?
CIHR · 2009 · Co-investigator
$86,603

All 2 grants and awards

From the 150 most recent of 252 publications.

Prognostic Factors in Sinonasal Cancers: A Multicenter Pooled Analysis.

Stefanovic M, Hernando-Calvo A, Castro JB, Huang SH, Su J, O'Sullivan B, Ringash J, Galiana IL, Borbalas AL, Cirauqui BC, Hahn E, Teruel I, de Almeida JR, Querol JM, Witterick IJ, Rubió-Casadevall J, Goldstein DP, Siu LL, Waldron J, Oliva M, Spreafico A

The Laryngoscope20264 citations

DOI: 10.1002/lary.70044 PMID: 40856008

Reduction of Bone Fracture After Radiation Therapy in Lower Extremity Soft Tissue Sarcoma After Implementing Bone Avoidance Objectives for Radiation Therapy Planning.

Othman H, Griffin A, Parent A, O'Sullivan B, Catton C, Chung P, Wong P, Shultz DB, Dickie CI, Wattakiyanon N, Tsoi K, Ferguson P, Wunder J, Kirsch DG

International journal of radiation oncology, biology, physics20262 citations

DOI: 10.1016/j.ijrobp.2025.09.071 PMID: 41101557

Impact of metastasis-directed therapy for metachronous thoracic metastases following definitive (chemo)radiotherapy in p16-positive head and neck squamous cell carcinoma.

Ly S, Rühle A, Bratman S, Cho J, Hosni A, Hahn E, Kim J, McPartlin A, Ringash J, O'Sullivan B, Tsai CJ, Waldron J, Goldstein D, Sanz-Garcia E, Spreafico A, Su J, Tong L, Weinreb I, Huang SH, Hope A

Oral oncology20261 citations

DOI: 10.1016/j.oraloncology.2026.108006 PMID: 42127862

Nomogram for Risk-Adaptive Estimation of the Locoregional Control Benefit Following Postoperative Radiation Therapy for Pathologic N0 Oral Cavity Cancer: A Retrospective Analysis.

Gau M, Su J, Huang SH, Alfaraj FA, Olson R, Marta GN, Kowalski LP, Kohler HF, de Matos LL, Moraes FY, Xu W, Sanz-Garcia E, Hahn E, Kim JJ, McPartlin A, O'Sullivan B, Tsai CJ, Waldron J, Prisman E, Irish JC, Yao CMKL, de Almeida JR, Goldstein DP, Hope A, Hosni A

International journal of radiation oncology, biology, physics20261 citationsOpen Access

DOI: 10.1016/j.ijrobp.2025.09.011 PMID: 40972905

Refining adjuvant radiation therapy decision using a nomogram in major salivary gland carcinoma.

Gau M, Su J, Huang SH, Alfaraj FA, Souied O, Mierzwa ML, Marta GN, Kowalski LP, Moraes FY, Xu W, Bayley A, Hahn E, Kim JJ, McPartlin A, O'Sullivan B, Hope A, Tsai CJ, Malik N, Waldron J, Bratman SV, Javed H, de Almeida JR, Yao CMKL, Hosni A

Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology20261 citations

DOI: 10.1016/j.radonc.2026.111528 PMID: 42001963

Prevalence and Prognostic Value of Individual T4-Defining Radiologic Features in Human Papillomavirus-Positive Oropharyngeal Carcinoma.

Johari MH, Rühle A, Su J, O'Sullivan B, Yu E, Waldron JN, McPartlin A, Bayley A, Bratman SV, Sanz-Garcia E, Spreafico A, de Almeida J, Hahn E, Hope A, Hosni A, Kim J, Malik N, Xu W, Bartlett E, Huang SH

International journal of radiation oncology, biology, physics20261 citations

DOI: 10.1016/j.ijrobp.2025.12.032 PMID: 41448500

Prognostic Value of Impaired Vocal Cord Mobility in T2N0 Glottic Cancer Treated With IMRT.

Rühle A, Subramani R, Su J, O'Sullivan B, Waldron JN, Hope A, Bayley A, McPartlin A, Malik N, Bratman SV, Hosni A, Kim J, Witterick I, de Almeida JR, Yao C, Spreafico A, Tsai CJ, Tong L, Xu W, Huang SH, Hahn E

The Laryngoscope20261 citationsOpen Access

DOI: 10.1002/lary.70424 PMID: 41654325

Disease Site-Specific Outcomes in p16-Positive Non-Oropharyngeal Mucosal Head and Neck Cancer.

Chelvarajah RC, Chee LYS, Su J, O'Sullivan B, Yao CMKL, Sanz-Garcia E, Smith SM, Weinreb I, Bratman S, Cho BCJ, Hahn E, Hope A, Hosni A, Kim J, McPartlin A, Malik N, Tsai CJ, de Almeida J, Spreafico A, Tong L, Huang SH, Waldron JN

Head & neck2026Open Access

DOI: 10.1002/hed.70230 PMID: 41816946

Diagnostic Performance of CT/MRI-Based Lymph Node Morphology With Three-Plane Size Measurements in Oral Cavity Cancer.

Johari MH, Bartlett E, Su J, O'Sullivan B, Weinreb I, Smith S, de Almeida J, Yao CMKL, Kim J, Bayley A, Yu E, Huang SH

Canadian Association of Radiologists journal = Journal l'Association canadienne des radiologistes2026Open Access

DOI: 10.1177/08465371261465409 PMID: 42544572

Head and Neck Lymph Node Metastases From Cancer of Unknown Primary: Outcomes From p16-Guided Mucosal Radiotherapy.

Harris P, Mabrouki DE, Nguyen-Tan FP, Filion E, Ballivy O, O'Sullivan B, Christopoulos A, Ayad T, Guertin L, Bissada E, Tabet P, Soulières D, Desilets A, Cheng AP, Doucet R, Létourneau-Guillon L, Bahig H

Head & neck2026Open Access

DOI: 10.1002/hed.70431 PMID: 42666021

Profile data last refreshed on September 29, 2026 from the university directory, publication records and public research funding records.

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Brian O'Sullivan

Research

Latest papers

Latest funding

Prognostic Factors in Sinonasal Cancers: A Multicenter Pooled Analysis.

Reduction of Bone Fracture After Radiation Therapy in Lower Extremity Soft Tissue Sarcoma After Implementing Bone Avoidance Objectives for Radiation Therapy Planning.

Impact of metastasis-directed therapy for metachronous thoracic metastases following definitive (chemo)radiotherapy in p16-positive head and neck squamous cell carcinoma.

Nomogram for Risk-Adaptive Estimation of the Locoregional Control Benefit Following Postoperative Radiation Therapy for Pathologic N0 Oral Cavity Cancer: A Retrospective Analysis.

Refining adjuvant radiation therapy decision using a nomogram in major salivary gland carcinoma.

Prevalence and Prognostic Value of Individual T4-Defining Radiologic Features in Human Papillomavirus-Positive Oropharyngeal Carcinoma.

Prognostic Value of Impaired Vocal Cord Mobility in T2N0 Glottic Cancer Treated With IMRT.

Disease Site-Specific Outcomes in p16-Positive Non-Oropharyngeal Mucosal Head and Neck Cancer.

Diagnostic Performance of CT/MRI-Based Lymph Node Morphology With Three-Plane Size Measurements in Oral Cavity Cancer.

Head and Neck Lymph Node Metastases From Cancer of Unknown Primary: Outcomes From p16-Guided Mucosal Radiotherapy.

Is the improvement in survival for HPV associated head and neck cancer due to the addition of chemotherapy to radiotherapy or to a more treatment-sensitive cancer?

Is the improvement in survival for HPV associated head and neck cancer due to the addition of chemotherapy to radiotherapy or to a more treatment-sensitive cancer?

Frequent collaborators

John Waldron

Andrew Hope

Jolie Ringash

Wei Xu

John Kim

Scott Bratman

Ali Hosni

Jonathan Irish

Andrew Bayley

John Cho

Meredith Giuliani

Anna Spreafico

Ezra Hahn

Eugene Yu

David Goldstein

Ilan Weinreb

Fei-Fei Liu

Lillian Siu

Bayardo Perez-Ordonez

John de Almeida

Dale Brown

Patrick Gullane

Ralph Gilbert

Ian Witterick

Eric Bartlett

Bernard Cummings

Eric Monteiro

Jeremy Freeman

David Payne

Peter Ferguson

Édith Filion

Osama Souied

Tareck Ayad

Allan Vescan

Laila Alshafai

Thomas Lindsay

Jay Wunder

Lawrence White

Navneet Singh

Sanjay Gupta