Dr. Brian O’Sullivan – Oncologist / Hematologist | Montréal, QC

Dr. Brian O'Sullivan, a Radiation Oncologist, utilizes advanced radiation therapies to treat various forms of cancer, working as part of a multidisciplinary team. Practicing at the Centre Hospitalier de l'Université de Montréal (CHUM) in Montréal, QC, he is part of a dedicated healthcare team committed to providing comprehensive cancer care. His practice is aligned with the standards set by the Collège des médecins du Québec (CMQ), ensuring high-quality, safe, and effective treatment. Dr. O'Sullivan's expertise includes the precise planning and delivery of radiation therapy for a wide range of cancer types, focusing on achieving optimal outcomes while maintaining patient well-being.

He graduated with a Medical Degree in 1984 and has been practicing as a Radiation Oncologist for over 40 years. His extensive post-graduate medical training and certification in Radiation Oncology (Cancer Treatment with Radiation) underpin his advanced clinical skills. Throughout his career, Dr. O'Sullivan has dedicated himself to staying at the forefront of medical advancements, ensuring his patients benefit from the latest evidence-based treatments and technologies.

Dr. O'Sullivan is committed to delivering patient-centered care through a multidisciplinary approach that emphasizes evidence-based treatment, compassionate support, and ongoing research. He is dedicated to supporting his patients and their families throughout their cancer journey, offering clear communication and tailored treatment plans. Fluent in French, he ensures effective communication with his diverse patient population in Montréal, fostering a supportive and hopeful environment for healing and recovery.

Dr. Brian O'Sullivan has expertise in managing a wide range of conditions, including:

Common Areas/Cancers Treated with Radiation Oncology

• Gynecologic Cancers (e.g., Cervical, Uterine, Vaginal, Vulvar - Radiation Aspects): Application of external beam radiation and/or brachytherapy for cancers of the female reproductive tract.
• Lymphomas & Hematologic Malignancies (Radiation Role): Utilizing radiation therapy in specific situations for Hodgkin and Non-Hodgkin lymphomas, or for conditioning before stem cell transplant.
• Gastrointestinal Cancers (e.g., Rectal, Anal, Pancreatic, Stomach): Role of radiation therapy in managing various cancers of the digestive system, often as part of combined modality treatment.

Common Cancers (Solid Tumors) Treated

• Melanoma & Advanced Skin Cancers: Aggressive forms of skin cancer, where oncologists manage systemic treatments like immunotherapy or targeted therapy for advanced or metastatic disease.
• Sarcomas (Bone & Soft Tissue - Systemic Therapy): Rare cancers arising from connective tissues, where medical oncologists administer chemotherapy or targeted therapies for advanced or metastatic disease.
• Ovarian, Uterine (Endometrial), & Cervical Cancers (Gynecologic Oncology - Medical Aspects): Systemic treatment aspects for cancers of the female reproductive system, often in collaboration with gynecologic oncologists or surgeons.

Hematologic Malignancies (Blood Cancers) Treated

• Acute Myeloid Leukemia (AML): A rapidly progressing cancer of the blood and bone marrow affecting myeloid cells.
• Acute Lymphoblastic Leukemia (ALL): A type of cancer of the blood and bone marrow that affects white blood cells called lymphocytes, common in children but also occurs in adults.
• Non-Hodgkin Lymphoma (NHL) (e.g., Diffuse Large B-Cell, Follicular, Mantle Cell): A diverse group of blood cancers that develop from lymphocytes, with many different subtypes requiring tailored treatments.

This list provides examples of common conditions treated and is not exhaustive. Cancer and blood disorders are complex, and treatment is highly individualized. For personalized advice, please discuss your specific situation with Dr. Brian O'Sullivan or your referring physician.

• Second Opinion Consultations for Cancer & Blood Disorders: Providing expert second opinions on complex diagnoses and proposed treatment plans to ensure informed decision-making.
• Radiation Therapy Consultation & Treatment Planning: Comprehensive assessment to determine if radiation therapy is an appropriate treatment modality, followed by meticulous 3D/4D simulation and treatment planning.
• External Beam Radiation Therapy (EBRT) - 3D Conformal, IMRT, VMAT: Developing precise, individualized plans for delivering radiation using external machines (e.g., linear accelerators) with techniques like Intensity-Modulated Radiation Therapy (IMRT) and Volumetric Modulated Arc Therapy (VMAT).
• Total Body Irradiation (TBI) - Component of Stem Cell Transplant Regimens: Radiation therapy delivered to the entire body, often used as part of the conditioning regimen before a bone marrow or stem cell transplant.
• Stereotactic Body Radiotherapy (SBRT) / Stereotactic Ablative Radiotherapy (SABR) / Stereotactic Radiosurgery (SRS): Delivering highly focused, high-dose radiation to precisely targeted tumors or lesions in the brain or body, often in a few treatment sessions.
• Palliative Radiation Therapy for Symptom Control: Using radiation to alleviate pain, bleeding, or obstruction caused by cancer.
• Comprehensive Oncologic & Hematologic Consultation: In-depth evaluation of medical history, review of diagnostic imaging and pathology, cancer staging (if applicable), and development of personalized treatment plans for various cancers and blood disorders.

Note: This list provides a general overview of services offered in Radiation Oncology (Cancer Treatment with Radiation). Treatment plans are highly individualized. Dr. O'Sullivan provides a wide array of diagnostic, therapeutic, and supportive care options tailored to each patient's specific condition and needs. Please discuss with Dr. O'Sullivan or your healthcare team for details relevant to your care.

All medical services and treatments are provided in accordance with the standards of practice set by the Collège des médecins du Québec (CMQ) and relevant cancer care guidelines. A referral is required.

Practicing at the Centre Hospitalier de l'Université de Montréal (CHUM), located in the vibrant Ville-Marie East (Quartier Latin, Village) neighborhood of Montréal, QC, Dr. O'Sullivan's clinic is easily accessible for patients. The facility is situated near landmarks such as Decarie Square (Shopping) and the Major North-South Expressway, making travel convenient by car or public transit. The Société de transport de Montréal (STM) (Métro, Bus) provides excellent connectivity to the site. The hospital premises are wheelchair accessible, ensuring ease of access for all patients. Parking is available at the facility for those arriving by car, providing added convenience for patients and visitors.

Are consultations and treatments with Dr. O'Sullivan, an Radiation Oncologist, covered by Régie de l'assurance maladie du Québec (RAMQ) in QC?

Medically necessary consultations, diagnostic tests (like biopsies, imaging reviews), chemotherapy, immunotherapy, targeted therapies, radiation therapy planning and delivery, and management of blood disorders by a licensed Radiation Oncologist such as Dr. O'Sullivan are generally covered by Régie de l'assurance maladie du Québec (RAMQ) in QC when a referral from a family doctor or another specialist is in place. Specific drug coverage for newer therapies can vary by provincial formularies and may require special authorization. It's always recommended to discuss coverage specifics with Régie de l'assurance maladie du Québec (RAMQ), Dr. O'Sullivan's office, the hospital's patient financial services, or the cancer care navigation services at the treatment facility.

Do I need a referral to see Dr. O'Sullivan, an Radiation Oncologist?

Yes, a referral from your family physician or another specialist is almost always required to see an Radiation Oncologist like Dr. O'Sullivan for assessment or treatment of cancer or significant hematological conditions. This ensures that your primary care provider is involved in your care continuum and that you are directed to the most appropriate specialist for your specific situation. Cancer care programs often have centralized intake systems that manage referrals to ensure timely access.

What happens after cancer treatment is completed with Dr. O'Sullivan?

After active cancer treatment finishes, Dr. O'Sullivan will develop a survivorship care plan with you. This plan typically includes a schedule for follow-up appointments and tests to monitor for any signs of recurrence, management of any long-term side effects from treatment, recommendations for healthy lifestyle choices (diet, exercise), and coordination with your family doctor for ongoing general health care. The goal is to support your long-term health and well-being.

What is immunotherapy and how does it work for cancer?

Immunotherapy is a type of cancer treatment that helps your own immune system fight cancer. It works by boosting or changing how the immune system works so it can find and attack cancer cells more effectively. There are different types of immunotherapy, including checkpoint inhibitors, CAR T-cell therapy, and cancer vaccines. Dr. O'Sullivan may recommend immunotherapy if it's an appropriate option for your type of cancer and will explain how it works and what to expect.

CHUM
DS3.5256 -1051 rue Sanguinet
Montréal, QC H2X 3E4

Phone: (514) 890-8000 | Fax: (514) 412-7537

The facility is wheelchair accessible.

Dr. O'Sullivan is a licensed Radiation Oncologist regulated by the Collège des médecins du Québec (CMQ) under the Medical Act in QC. A referral from a family physician or other specialist is required for most consultations and treatments under the provincial health plan.

Verify registration with the Collège des médecins du Québec (CMQ): https://www.cmq.org/en/directory/physicians?number=84003