McMaster University

McMaster University

Division of Endocrinology: Child with health care provider
Contact Information

Dr. John VanderMeulen,
Division Head

Health Sciences Centre, Room 3A
1280 Main Street West,
Hamilton, Ontario   L8S 4K1
Phone: 905-521-2100, ext. 73716
Fax: 905-308-7548

Division of Endocrinology

About Endocrinology

The Division of Endocrinology specializes in the diagnosis and management of a wide variety of hormonal disturbances seen in infancy, childhood and adolescence.  The activities of the Division divide broadly into General Endocrinology and Diabetes. 

Disorders of growth and sexual development are common reasons for referral to the General Endocrinology Clinic. Specific conditions relating to pituitary, thyroid , adrenal and gonadal dysfunction function are diagnosed and treated including certain genetic conditions with endocrine manifestations. In addition, a specialty clinic focusing on disorders of calcium and bone metabolism is offered.

The Diabetes Clinic provides services to a large number of patients and families with type 1 diabetes. We are a tertiary centre within the provincial pediatric diabetes network and provide a model of care that is multi-disciplinary. This includes the services and expertise of certified diabetes nurse educators, dieticians, social work and child life in addition to a team of pediatric endocrinologists/diabetologists.  More rare forms of diabetes, including neonatal diabetes and MODY (Maturity Onset Diabetes of the Young) are also seen and managed through our centre as are youth with type 2 diabetes. 

Transition to adult care is a challenge for many pediatric patients with chronic illnesses. A pediatric diabetes transition program has been developed that involves an endocrinologist, qualified in both pediatric and adult endocrinology, and the expertise of a specialist in adolescent medicine.

Close collaboration exists between the Division of Endocrinology and the Division of Children's Exercise and Nutrition (CENC)

Division Members

Dr. John VanderMeulen
Division Head &

Dr. Karen McAssey
Assistant Professor

Dr. Katherine Morrison
Associate Professor

Dr. M. Constantine Samaan
Associate Professor

Dr. Zubin Punthakee
Associate Professor

Dr. Ereny Bassilious
Assistant Professor

Pediatric Endocrinology Fellowship Program

The Endocrinology Fellowship Program in the Department of Pediatrics provides advanced training in clinical medicine, research and education. Visit our website for more details and program information.

Endocrinology Referrals

In our efforts to minimize wait times and optimize your patient's initial visit with us, we kindly ask that you complete a disease specific checklist found on our McMaster Children's Hospital website under the link "how to refer a patient."
Please note that we will be unable to triage your referral until the required form and documentation are completed and attached to your referral.

Endocrinology Rounds

Pediatric Endocrinology Rounds are held every Friday from 12-1pm in room 1J8.

Visit the Endocrinology Rounds webpagefor updates and details about upcoming presentations.

In the News

Student and Prof blend science and animation to educate about childhood obesity

Click here to read the full article.

Faculty Spotlight

Dr. John VanderMuelen shares the story of a patient who received expert care, and for whom he truly made a difference.

(Read: Making A Difference: Dr. John Vandermuelen)

Dr. Karen McAssey's activities are varied. Find out more about this director, leader, advisor, clinician, and teacher.

(Read: And You Think You're Having a Busy Day)

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