Cathryn Sibbald

Clinician, Division of Dermatology, Department of Medicine, Unity Health

Principal Investigator, SickKids Research Institute

Dr. Sibbald completed her medical degree and dermatology residency training at the University of Toronto and a one-year fellowship in paediatric dermatology at the Children’s Hospital in Philadelphia.

Prior to medical school, she completed a pharmacy degree in Toronto and worked as a clinical pharmacist at The Hospital for Sick Children (SickKids) for the solid organ transplant service. She has a M.Sc. in clinical epidemiology through the London School of Hygiene and Tropical Medicine. 

Research

Sibbald’s research has combined her knowledge and skills in clinical epidemiology with several systematic reviews of comorbidities and treatments.

Her research focuses on inflammatory conditions, including morphea, alopecia and hidradenitis suppurativa, all of which have specialty clinics that she is involved with at SickKids. She also has an interest in complex drug reactions (including drug hypersensitivity syndromes) and new targeted and biologic treatments for cutaneous diseases.  

Education and experience

• 2025–Present: Associate Professor, Cross Appointment, Division of Dermatology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
• 2020 - Present: Clinician, Division of Dermatology, Department of Medicine and Paediatrics, Unity Health (St Joseph’s Health Science Center), Toronto, Ontario, Canada
• 2020–Present: Principal Investigator, SickKids Research Institute, The Hospital for Sick Children, Toronto, Ontario Canada
  
• 2020–2025: Clinician Associate, Division of Dermatology, Department of Medicine, Women’s College Hospital, Toronto, Ontario, Canada
• 2020–2025: Assistant Professor, Cross Appointment, Division of Dermatology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
• 2018–2019: Fellowship, Pediatric Dermatology, Children’s Hospital of Philadelphia/ University of Pennsylvania, PA, U.S.A.
• 2014–2019: M.Sc. Epidemiology, London School of Hygiene and Tropical Medicine, London, U.K. 
• 2013–2018: Residency, Dept of Dermatology, University of Toronto, Toronto, Ontario, Canada
• 2009–2013: Undergraduate degree in Medicine, University of Toronto, Toronto, Ontario, Canada
• 2008–2009: Clinical Pharmacist, Solid Organ Transplant Unit, The Hospital for Sick Children, Toronto, Ontario, Canada

Achievements

• 2026: Power Teaching Award, for recognition of one of the top postgraduate teachers, as reflected in the teaching evaluations from the core paediatric residents. Department of Paediatrics. Temerty Faculty of Medicine. University of Toronto, Toronto, Ontario, Canada. (Specialty: Dermatology).
• 2025: Teaching Excellence Award, University of Toronto MD Program, Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada. In recognition by the students of the MD Program for exemplifying excellence in Undergraduate medical education. 
• 2022: Power Teaching Award, for recognition of one of the top postgraduate teachers, as reflected in the teaching evaluations from the core paediatric residents. Department of Paediatrics. Temerty Faculty of Medicine. University of Toronto. 
• 2020: Faculty Teaching Award, for a faculty member providing teaching to dermatology residents. University of Toronto, Toronto, Ontario, Canada. (Specialty: Dermatology). 
• 2018: PARO (Professional Association of Residents of Ontario) Resident Teaching Award
• 2018: Women’s Dermatologic Society Mentorship Award (Mentor Dr. Tina Alster)
• 2017: American Academy of Dermatology Cochrane Scholarship
• 2016: Canadian Professors of Dermatology Trainee Award for Oral Presentation

1. Akiska YM, Fu J, Castelo-Soccio L, Mathes E, Mirmirani P, Jamerson T, Sibbald C; and The Pediatric Low-Dose Oral Minoxidil Consensus Expert Group; Spagnol Abraham L, Ali A, Arkin LM, Asfour L, Austin K, Bhoyrul B, Buethe MG, Callender VD, Cheng CE, Chitreddy V, Craddock M, Cranwell W, Craiglow BG, Desai NS, Doche I, Duque-Estrada B, Eisman S, Friedman A, Giacaman A, Hordinsky M, Jabbari A, Kang HB, King B, Kushnir-Grinbaum D, Mesinkovska N, Netravali IA, Oboite M, Olsen EA, Orlow SJ, Oza VS, Ovcharenko Y, Paller A, Patel S, Piliang M, Pirmez R, Rakowska A, Müller-Ramos P, Saceda-Corralo D, Salkey KS, Bellodi Schmidt F, Sinclair R, Lo Sicco K, Soung J, Steuer M, Senna MM, Tarbox M, Tosti A, Turbeville J, Wall D. Low-Dose Oral Minoxidil Use for Pediatric Hair Disorders: An International Consensus Statement. JAMA Dermatology. 2026 September 30. doi: 10.1001/jamadermatol.2026.3749. 
2. Mehta S, Mistry J, Moshkovich M, Sugumar C, Buros Stein A, Sibbald C. Predictors of Systemic Treatment Response in Pediatric Alopecia Areata: A Retrospective Cohort Study. Journal of the American Academy of Dermatology. 2026 August 8:S0190-9622(26)03279-2. doi: 10.1016/j.jaad.2026.08.008. 
3. Dienes S, Rahmani A, Lara-Corrales I, Levy R, Alhusayen R, Barnett A, Croitoru D, George R, Hamilton J, Johnson K, Joseph M, Palmer L, Mirza R, Piguet V, Sangha N, Liy Wong C, Sibbald C. Clinical Characteristics and Management of Pediatric Hidradenitis Suppurativa: A Canadian Single-Centre Multidisciplinary Experience. Journal of Cutaneous Medicine and Surgery. 2026 February 12:12034754251404461. doi: 10.1177/12034754251404461. 
4. Rahmani A, Dienes S, Lara-Corrales I, Levy R, Alhusayen R, Barnett A, Croitoru D, George R, Hamilton J, Johnson K, Joseph M, Palmer L, Mirza R, Piguet V, Sangha N, Liy Wong C, Sibbald C. Efficacy and safety of moxifloxacin in pediatric hidradenitis suppurativa: Results from the Canadian Multidisciplinary Registry of Pediatric HS. Journal of Cutaneous Medicine and Surgery .2026 February 9:12034754261418268. doi: 10.1177/12034754261418268. 
5. Moshkovich M, Sugumar C, Sibbald C. Characterizing Tofacitinib Response in Pediatric Alopecia Areata: A Retrospective Review. Journal of Cutaneous Medicine and Surgery. 2026 March-April;30(2): pp 170-172.  doi: 10.1177/12034754251347577. 

View a full list of Cathryn Sibbald's publications