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Tanuja Chitnis, M.D.
MS Neurologist

Dr. Chitnis is the Director of the MGBH Pediatric MS Center at the MGH for Children and a Professor of Neurology at Harvard Medical School. She also sees adult patients with MS at the Brigham and Women’s Hospital (see the site for the adult MS Center). She completed her medical training at the University of Toronto Medical School, her Neurology residency at Hahnemann University in Philadelphia, and a fellowship in Multiple Sclerosis and Neuroimmunology at the Brigham and Women’s Hospital, Harvard Medical School. Dr. Chitnis has had a longstanding interest in Pediatric MS. She is also the past Chair of the International Pediatric MS Study Group(2010-2018). She has authored over 250 publications and reviews related to multiple sclerosis, neuromyelitis optica, and MOG-antibody associated diseases. She is actively involved in several research projects to help to better understand and treat MS in children including leading the first clinical trial for pediatric MS.

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Ellen O’Donnell, Ph.D.
Child Neuropsychologist

Ellen O’Donnell, Ph.D. is a Staff Psychologist in the MGH Learning and Emotional Assessment Program (LEAP) and an Instructor in Psychiatry at Harvard Medical School.  She specializes in neuropsychological and academic assessment with children and adolescents with medical illness and has been the Pediatric Neuropsychologist for the Partners Pediatric MS Center since 2009.  She is actively involved in research to better understand cognitive and school outcomes in children with Pediatric MS.  She is also interested in developing interventions for children affected by both medical illness and learning disabilities.  Dr. O’Donnell received her M.A. and Ph.D. in clinical psychology at Clark University and completed her pre-doctoral internship and post-doctoral fellowship at MGH. She is a licensed clinical psychologist and health care provider in the State of Massachusetts.

Katia Canenguez, Ph.D., Ed.M.

Katia is a Pediatric Psychologist in the Department of Child and Adolescent Psychiatry at the Massachusetts General Hospital. She is a bi-cultural/bi-lingual (Spanish speaking) clinician/researcher interested in health/mental health disparities and providing integrative pediatric health care. Dr. Canenguez received her B.A. from Boston College, Ed.M. from Harvard University, Ph.D. from University of Massachusetts, Boston, and completed her pre-doctoral internship at MGH. Her role at the Partners Pediatric MS Center is to provide clinical assessment, psychoeducational and psychotherapeutic services to pediatric MS patients and their families. In addition, Dr. Canenguez coordinates school consultation to ensure the appropriate academic programs are implemented for each child.

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Tanya O’Connell, R.N.
Pediatric Nurse

Tanya O’Connell is a Registered Nurse in the Pediatric Neurology Clinic and MS Center at MGBH. Tanya received her Bachelor of Science in Nursing from Southern New Hampshire University and a Bachelor of Science in Public Health from Worcester State University. She has experience working across multiple settings with children and adolescents diagnosed with neurological and psychiatric disorders.  Her clinical interests include pediatric multiple sclerosis, autism, epilepsy, and behavioral disorders. In her role as a nurse, she is available to provide support to patients and their families, bring forth information and education, and assist in the coordination of patient care.

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Eunnindy Sanon, BSc
Clinical Research Coordinator                           

Eunnindy Sanon is a research coordinator at the MGBH and Pediatric MS Center at MGH. Eunnindy obtained her Bachelor of Science in Chemistry and Clinical Psychology from the University of Connecticut. As she was in school, she worked at Yale-New Haven Hospital and took an internship class where she worked with children diagnosed with Dyslexia and Autism and helped them progress in daily activities, especially in school. She also conducted a study with the head of the Clinical Psychology Professor at UConn which focused on The Ebbinghaus Illusion of Size Perception and Context-Sensitivity. Eunnindy hopes to continue her education and become a Physician Assistant and work with patients who suffer from mental illnesses, which have been a passion of hers to learn more about. In her role as a research coordinator, she assists in recruiting patients for various research studies, as well as in ongoing study procedures.

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Laura Saucier, MD
Post-Doctoral Fellow 

Dr. Laura Saucier is currently a clinical fellow in Pediatric MS & Neuroimmunology at Mass General Hospital, Brigham and Women’s Hospital, and Boston Children’s Hospital. She received a Bachelor of Science in Biology – Neuroscience from Duke University and a Master of Science in Global Health from the University of California San Francisco. She completed her medical education at Stanford University School of Medicine and her child neurology residency at Stanford University Hospital and Stanford Children’s Health / Lucille Packard Children’s Hospital. Laura is the recipient of the MS Clinical Care Physician Fellowship from the National MS Society. Her clinical and research interests include pediatric multiple sclerosis, MOG antibody disease, and peri-/post-infectious neuroinflammatory disorders in children and adolescents.




Dr. Gina Forchelli is a Licensed Clinical Psychologist and Nationally Certified School Psychologist at the Learning and Emotional Assessment Program (LEAP) within the Department of Psychiatry at Massachusetts General Hospital in Boston, MA. She is the Director of Postdoctoral Training at LEAP and an Instructor at Harvard Medical School. Dr. Forchelli specializes in pediatric neuropsychological, psychological, and educational assessment of children, adolescents, and young adults with complex neurodevelopmental, psychological, and behavioral concerns. She has completed training across multiple settings including an outpatient trauma-based clinic, residential therapeutic school, public school, and post-secondary/college settings. She has been with the Partners Pediatric MS Center since January 2021. Her research and clinical interests aim to facilitate understanding across providers on supporting and advocating for the needs of children/adolescents with highly complex cognitive, medical, academic, and social-emotional needs.
Dr. Forchelli received dual psychology and music at Muhlenberg College. She completed her M.Ed. in School Psychology at Teachers College-Columbia University. Before returning to complete her Ph.D., she worked as a school psychology intern within the White Plains School District in NY. Her Ph.D. was completed at Temple University in Philadelphia, PA. She completed her postdoctoral training in pediatric neuropsychological assessment at the LEAP at MGH.

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