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Dr Leong Yiat Horng

Photo of Dr Leong Yiat Horng
B.Eng (Singapore), MBBS (Australia), FRANZCR (Radiation Oncology)
Consultant, Department of Radiation Oncology, National University Cancer Institute, Singapore
Special Interest:

Head and neck cancer

Gynaecological cancer

Breast cancer

National University Cancer Institute, Singapore
National University Health System
National University Hospital

Dr Leong Yiat Horng is a Consultant at the National University Cancer Institute, Singapore (NCIS).  After obtaining his Bachelor of Engineering in 2000, he pursued medical training in Sydney, Australia and graduated from the University of Sydney (MBBS) in 2005. Integrating his knowledge in both engineering and medicine, he underwent specialist training in Radiation Oncology at NCIS. He was admitted as a Fellow of the Royal Australian and New Zealand College of Radiologists and obtained specialist accreditation in Singapore in 2015. He has vast clinical experience in both Singapore and Australia, and that includes a specialist training stint in 2014 at the Royal Perth Hospital, Australia where he honed his skills in head and neck radiotherapy.

Dr Leong’s specialty and research interests are in head and neck, gynaecological and breast cancers. He also has a keen interest in gynaecological and breast brachytherapy.  He is the Principal Investigator of a current randomized controlled trial studying the role of a silicone-based cream in radiation dermatitis for head and neck cancers. His research portfolio also includes basic research on radiotherapy.  

Dr Leong is actively engaged in the education of radiotherapy diploma students and undergraduate medical students and is a Clinical Mentor at the Yong Loo Lin School of Medicine, NUS.

Awards and Honours

2015 - NCIS Grant SGD50,000 for project on Head and Neck cancer

Research and Publications


1. Yiat Horng Leong, Jeremy Tey et al. Oncologic outcomes of neoadjuvant chemoradiation for locally advanced rectal cancer: a single-institution experience. Annals Academy of Medicine Singapore 2014; 43: 569-75.

2. Yiat Horng Leong, Eli Scher, Nancy Lee, Ivan Tham. Major Salivary Glands. Target volume delineation for conformal and intensity-modulated radiation therapy. Springer 2015; 91-102.    


1. Yiat Horng Leong, Yuyang Soon, Francis Ho. Long-term Outcomes After Reirradiation in Nasopharyngeal Carcinoma with Intensity-modulated Radiotherapy: a Meta-analysis of Clinical Evidence. RANZCR ASM Oral Presentation 2016.

2. Yiat Horng Leong, Vicky Koh et al. Feasibility and safety of combined intracavitary and interstitial brachytherapy for cervix carcinoma with sedation in the outpatient setting. RANZCR ASM Oral Presentation 2016.

3. Yiat Horng Leong, Cheng Nang Leong, Jeremy Tey et al. Oncologic outcomes of neoadjuvant chemoradiation for locally advanced rectal cancer: the Tan Tock Seng Hospital experience. Nominated for Best Poster Award at the Congress of ASEAN Society of Colorectal Surgeons 2014.