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Adj Asst Prof Lester Leong Chee Hao

Adj Asst Prof Lester Leong Chee Hao

MBBS (Singapore), MMed (Diagnostic Rad), FAMS

Senior Consultant

KK Women's and Children's Hospital

Specialty: Diagnostic Radiology

Sub-specialties: Breast Imaging

Conditions Treated by this Doctor:
3D Digital Breast Tomosynthesis, Breast Cancer, Breast Fibroadenoma, Breast Imaging, Breast Infection, Breast Lumps, Breast Needle Biopsies, Breast Vacuum-Assisted Biopsies, Contrast-Enhanced Mammography, Early Detection and Breast Screening, EOS Imaging, Magnetic Resonance Imaging (MRI) Brain, Magnetic Resonance Imaging (MRI) Scan, Magnetic Resonance Imaging (MRI) Scan, Mammography, Mammography, MRI-Guided Breast Biopsies, Nipple Discharge, Ultrasound Breast Elastography.

Clinical Appointments

  • Senior Consultant Department of Diagnostic & Interventional Imaging KK Women's and Children's HospitalKK Women's and Children's Hospital
  • Senior Consultant Diagnostic Radiology Singapore General HospitalSingapore General Hospital

Academic Appointments

  • Adjunct Assistant Professor SingHealth Duke-NUS Radiological Sciences Academic Clinical Programme


Dr Lester Leong is a Senior Consultant with the Department of Diagnostic & Interventional Imaging at the KK Women's and Children's Hospital and the Department of Diagnostic Radiology at the Singapore General Hospital. Dr Leong is an Adjunct Assistant Professor with the Radiological Sciences Academic Clinical Program, SingHealth Services, Duke-NUS Medical School.

He completed his specialty traineeship in Diagnostic Radiology in Singapore. His subspecialty interest is breast imaging and he underwent a fellowship in breast imaging under the auspices of the SingHealth's Human Resource Development Program Scholarship at the Brigham and Women’s Hospital, Boston, Massachusetts, United States of America in 2010. He did another fellowship in breast imaging at the St Bartholomew’s Hospital in London, UK. He has special research interests in breast cancer screening, breast MRI imaging, ultrasound breast elastography,  and imaging evaluation of axillary nodes.

Dr Leong is the Immediate Past Chairperson of the Chapter of Diagnostic Radiologists, College of Radiologists, Singapore and the Immediate Past Chair of the Breast Imaging Subsection, Singapore Radiological Society, Singapore. In addition, Dr Leong is an active contributor to teaching and continuing medical education in radiology. He serves as Core Faculty and Audit Director of the SingHealth Diagnostic Radiology Residency Programme. He is also a founding member and Chairperson of the biennial BreastDay Multidisciplinary Meeting.


  • ​Bachelor of Medicine, Bachelor of Surgery (MBBS), National  University of Singapore (1998)
  • Master of Medicine (Diagnostic Radiology) Singapore (2006)
  • Fellow of the Academy of Medicine of Singapore (FAMS) (2009)
  • Fellow, Lee Bell Center for Breast Imaging, Brigham and Women’s Hospital, Boston, USA (2010)
  • Fellow, Diagnostic Radiology, St Bartholomew’s Hospital, London, UK (2013)

Professional Appointments and Committee Memberships

  • Senior Consultant, Department of Diagnostic Radiology, Singapore General Hospital, Singapore
  • Adjunct Assistant Professor, Radiological Sciences Academic Clinical Program, SingHealth Services, Duke-NUS Graduate Medical School.
  • Immediate Past Chairperson, Chapter of Diagnostic Radiologists, College of Radiologists, Singapore
  • Immediate Past Chairperson, Breast Imaging Subsection, Singapore Radiological Society
  • Committee Member, First Subcommittee for The National Advisory Committee on Cancer, Ministry of Health, Singapore
  • Committee Member, Chapter of Diagnostic Radiologists, College of Radiologists, Singapore 
  • Chairman, Breast Cancer Screening Workgroup, College of Radiologists, Singapore 
    Fellow, Academy of Medicine, Singapore
  • Committee Member, Screening Test Review Committee, Academy of Medicine, Singapore
  • Core Faculty, Breast Imaging, SingHealth Diagnostic Radiology Residency Programme
  • Audit Director, SingHealth Diagnostic Radiology Residency Programme
  • Member, Singapore Medical Association, Singapore
  • Member, American College of Radiology, USA
  • Member, American Roentgen Ray Society, USA


  • Best Diagnostic Scientific Poster, Singapore Congress of Radiology in conjunction with 19th Congress of the ASEAN Association of Radiology, Singapore (August 2019)
  • Scientific E-poster Merit Awards (2), RadiologyAsia Conference 2018, Singapore (May 2018)
  • Singapore Health Quality Service Award 2018 - Silver Award (Jan 2018)
  • Best Educational Poster, RadiologyAsia Conference 2017, Singapore (May 2017)
  • Service with a Heart Award (Medical) (Jan 2016)
  • 1st prize, Best E-poster Award Oct at the 12th Asian Breast Diseases Association Conference in Bali, Indonesia  (Oct 2014)
  • Best Poster Award at the 20th Annual Scientific Meeting of the Singapore Radiological Society and College of Radiologists in conjunction with the 15th ASEAN Association of Radiology Meeting, Singapore (May 2011)
  • Best Scientific Paper Award at the 13th Asian Oceanian Congress of Radiology in Taipei, Taiwan (Mar 2010)
  • Excellent Service Award (EXSA) - Silver Award (Sep 2009)
  • SingHealth Human Resource Development Program Scholarship (Apr 2009)
  • 2nd Prize for Scientific Oral Presentation at the Singapore General Hospital 18th Annual Scientific Meeting, Singapore (Apr 2009)
  • Merit Award for Scientific Exhibit at the 94th Radiological Society of North America Scientific Assembly and Annual Meeting in Chicago, USA (Dec 2008)
  • Silver Award for Poster presentation at the 14th ASEAN Association of Radiology Meeting Hanoi, Vietnam (Sep 2008)
  • Singapore General Hospital Service Quality Award (Nov 2008)
  • SARS Courage Award  (May 2003)

Research Interests


  • Evaluating the Preoperative Breast Cancer Characteristics Affecting the Accuracy of Axillary Ultrasound Staging. Upadhyaya VS, Lim GH, Chan EYK, , Fook-Chong SMC, Leong LCH. Breast J (In Press, accepted for publication Sep 2019). 
  • Rare Case of Bilateral Male Breast Myofibroblastomas with Radio-Pathological Correlation.
    Gambre A, Tan PH, Hamzah JL, Cheng CL, Leong LCH. Breast J. 2019 Jun. doi: 10.1111/tbj.13405. [Epub ahead of print].
  • Breast Calcifications in Patients with End-Stage Renal Disease. Basu P, Leong LCH, Tan BY, Tan BKT. Breast J. 2019 May; 25(3):515-516.  
  • Pseudoaneurysm After Vacuum-Assisted Breast Biopsy Treated with Percutaneous Thrombin    
    Injection. Xiang F, Gogna A, Leong LCH, Tan BKT. Breast J. 2019  Mar; 25(2):318-319.
  • Determining Whether High Nodal Burden in Early Breast Cancer Patients can be Predicted 
    Preoperatively to Avoid Sentinel Lymph Node Biopsy. Lim GH, Teo SY, Allen JC, Chinthala JP, Leong LCH. J Breast Cancer. 2019 Jan 30;22(1):67-76   
  • A Comparative Study of Pattern-Based Versus Size Ratio Ultrasound Strain Elastographic 
    Techniques on Breast Masses. Leong LCH, Moey THL, Tan PH, Sim LSJ. Journal Ultrasound Med. 2019 Jul; 38(7):1779-1790.   
  • Preoperative Predictors of High and Low Axillary Nodal Burden in Z0011 Eligible Breast Cancer       
    Patients with a Positive Lymph Node Needle Biopsy Result. Lim GH, Upadhyaya VS, Acosta HA, Adolfo-Lim JM, John C Allen JC, Leong LCH. Eur J Surg Oncol. 2018 Jul; 44(7):945-950.
  • Metastasis of Primary Lung Carcinoma to Breast: an Unusual Presentation. Aw AKL, Leong LCH, Tan BKT. Breast J. 2018 May; 24(3):406-407.   
  • Development Of A Surgical Algorithm by Using Pre-Operative Imaging To Predict Mammoplasty 
    Cosmetic Outcomes for Large Non-Malignant Tumours. Lim GH, Ng RP, Leong LCH. Gland Surg. 2017 Dec; 6(6):649-653.
  • Clinics in Diagnostic Imaging - Ductal Carcinoma-in-Situ. EJ Tan, Moey THL, Madhukumar P, Leong LCH. Singapore Med J 2017 Oct; 58(10): 585-592.
  • Ultrasound Breast Elastographic Evaluation of Mass-Forming Ductal Carcinoma-in-situ with Histological Correlation - New Findings for a Toothpaste Sign. Leong LCH, Sim LSJ, Jara-Lazaro AR, Tan PH. Asian Pac J Cancer Prev. 2016;17(5):2673-8.
  • MRI Kinetics with Volumetric Analysis in Correlation to Hormonal Receptor Subtypes and Histological Grade of Invasive Breast Cancers. Leong LCH, Gombos EC, Jagadeesan J, Fook-Chong SMC. Am J Roentgenol. 2015 Mar; 204(3):W348-56
  • Clinics In Diagnostic Imaging:  Male  Breast  Carcinoma. Tan  TJ,  Leong  LCH,  Sim  LSJ. Singapore Med J 2013 Jun; 54(6): 347-352.
  • Supplementary Breast Ultrasound Screening in Asian Women with Negative but Dense Mammograms - a Pilot Study. Leong LCH, Gogna A, Pant R, Ng FC, Sim LSJ. Ann Acad Med Singapore. 2012 Oct; 41(10):432-39.  
  • A Prospective Study to Compare the Diagnostic Performance of Breast Elastography Versus Conventional Breast Ultrasound. Leong LCH, Sim LSJ, Lee YS, Ng FC, Wan CM, Fook-Chong SMC, Jara-Lazaro AR, Tan PH.   Clinical Radiology 2010 Nov ;65(11):887-894

Press/Website Publications

  • Reply to Article on the Study on Asians' Breast Cancer Risk. The Straits Times Forum. Co-author. Published 25 Apr 2012. 
  • Benefits Of Screening Mammography. The Straits Times Forum. Co-author. Published 28 Jun 2012.
  • College of Radiologists' Update on the Canadian National Breast Screening Trial. Lead author. Published Jun 2014.
  • Benefits Of Mammogram Screening Outweigh Drawbacks. The Straits Times Forum. Co-author. Published 2 Nov 2016.    
  • College of Radiologists' Advisory on Linear Gadolinium-Based Contrast Agents. Lead author. Published Nov 2017.
  • Mammogram Benefits Outweigh Disadvantages. The Straits Times Forum. Co-author. Published 23 Jun 2018.

Research Trials