1. Surgical Management of Complications of Multimodal Therapy. 43rd International Society of Pediatric Surgical Oncology Symposium. Auckland, New Zealand. 26-30 Oct 2011.

2. Surgery in Neuroblastoma. The Second International Seminar on the Topic of Neuroblastoma Training Class for Inducing Differentiation Treatment for Neuroblastoma. Shenyang, China. 15-17 Jul 2011

3. Surgical Treatment in Neuroblastoma. 5th Guangdong Province Paediatric Oncology Congress. Sun-Yat Sun University Cancer Centre, Guangzhou, China. 26 Nov 2011

4. Unique Surgical Characteristics in Advanced Neuroblastoma. Annual Clinical Meeting, Mount Elizabeth Hospital, Singapore. Nov 2007

5. Surgical Options for Neuroblastoma in the Thorax. 39th Congress of International Pediatric Surgical Oncology, Mumbai, India. 31 Oct 2007

6. Delayed Complete Resection of Advanced Neuroblastoma. 1st ASEAN Congress for Pediatric Surgeons. Malaysia. August 2006.

7. Molecular Genetics in Paediatric Cancer Surgery. Symposium on Advances in Management of Malignant Diseases. Annual Scientific Meeting, KK Women’s and Children’ s Hospital. 8 Jul 2006

8. Gross Total Resection in Chemoresponsive Advanced Neuroblastomas – Preliminary results from KK Children’s Hospital. 4th SIOP-Asia Congress in Shanghai, China, April 2006.

9. Paediatric Oncological Surgery in Neuroblastoma. ASEAN Childhood Cancer Workshop 2006 (Neuroblastoma and Lymphoma), Singapore, 3-5 March 2006

10. Childhood Mediastinal Masses that Underwent Surgical Reseaction. 37th Congress of International Pediatric Surgical Oncology at Vancouver, Canada, Sep 2005.

11. Appendectomies in Childhood Immunosuppression : in for a rough ride ? 36th Congress of International Pediatric Surgical Oncology at Oslo, Norway, Sep 2004.

12. Central Venous Access Ports in Childhood Cancers. Singapore-Malaysia Congress of Medicine in Kuala Lumpur, Malaysia, Sep 2003.

13. Critical Mediastinal Mass Syndrome in Childhood Cancers. Singapore-Malaysia Congress of Medicine in Kuala Lumpur, Malaysia, Sep 2003.

14. Is re-excision necessary in Pediatric Nonrhabdomyosarcoma soft-tissue sarcoma after an initial unplanned resection ? 33rd meeting of Societe Internationale D’ Oncologie Pediatrique (SIOP), Brisbane 2001

15. Vascular Invasion in Hepatoblastoma – a threat to treatment outcome ? 1st SIOP-Asia meeting on April 26, 2000

16. Meeting Changing Trends in the Management of Hepatoblastoma in Singapore. 1st SIOP-Asia meeting on April 26, 2000

B. Endoscopic Surgery

1. VATS (video-assisted thoracoscopic surgery) in Children. Annual Scientific Meeting, KK Women’s and Children’s Hospital, Singapore. 26 Jul 2008. 

2. Surgical Advances in Children with Feeding Difficulties. Paediatric Conference, Mount Elizabeth Hospital Singapore, 18 Mar 2008.

3. The Role of Minimally Invasive Surgery in Children. Medical Conference, Mount Elizabeth Hospital, Singapore. 30 Nov 2007.

4. How Children Differ from Adults in MIS (Minimally Invasive Surgery) ? Paediatric Laparoscopy Masterclass. 18th Videourology World Congress. Singapore 2 March 2007.

5. Laparoscopic Varicocelectomy – MIS Masterclass. 8th Congress of Asia-Pacific Association of Pediatric Urologists. Singapore Sep 2006

6. Umbilicus : Window of Opportunity in Pediatric Laparoscopy. Congress of Asian Association of Pediatric Surgeons, Hong Kong, Nov 2005

7. Advances in Paediatric Video-assisted Thoracoscopic Surgery. Thoracoscopic Surgery Workshop. Singapore-Malaysia Congress of Medicine. 2005

8. Advances in Paediatric Endosurgery. Perioperative Nursing Seminar-Towards Excellence at KK Women’s and Children’s Hospital, Singapore, 8 May 2004

9. Pediatric Laparoscopy in Suspected Acute Appendicitis – What Else Can It Be ? International Pediatric Endoscopy Group (IPEG) Congress, in Los Angeles, USA, 10 – 13 March 2003.

10. Scrub Nurses’ Attitude Towards Development of Pediatric Minimally Invasive Surgery in Singapore. International Pediatric Endoscopy Group (IPEG) Congress, in Los Angeles, USA, 10 – 13 March 2003.

11. Initial 5 years in the Development of Minimally Invasive Surgery in a Pediatric Surgical Unit. 18th Congress of Asian Association of Pediatric Surgeons, Oct 2002.

12. How I do Laparoscopic Fundoplication and Button Gastrostomy ? 18th Congress of Asian Association of Pediatric Surgeons, Oct 2002.

13. The Surgical Advances in Severe Childhood Feeding Difficulties. Monthly Hospital Conference at KK Women’s and Children’s Hospital 1 Mar 2003

14. Laparoscopy in the evaluation of the nonpalpable undescended testis. 2nd Paediatric Annual Scientific Meeting, KK Women’s and Children’s Hospital, Sep 1998

C. Other Topics

1. Abdominal Pain in Children. Medical Conference, Parkway Hospitals, Singapore. 18 Nov 2007.

2. Intussusception – Surgical Concepts and Management. Monthly KK Women’s and Children’s Hospital Conference, 4 May 2007.

3. Intestinal Obstruction in Children. Paediatric Intensive Care Nursing Course, Singapore. Mar 2007.

4. Abdominal Wall Defects and Anorectal Malformations. Lecturer, Advanced Diploma in Nursing at Nanyang Polytechnic, Singapore. 2006

5. Changes in Practice – A Concise Update on Recent Developments in Paediatric Surgery. 4th Practice Update in Paediatrics. KKH, 30 Jul 2006

6. Acute Abdomen – Recognition & Initial Management in Primary Care Setting. 2nd Practice Update in Paediatrics, KKH, 14 Aug 2004

7. Scabbing in Childhood Circumcisions - Hospital Monthly Research Meeting, KK Women’s and Children’s Hospital, November 1998.

8. Gastrointestinal Phytobezoars Causing Obstruction. 30th Annual Combined Surgical Meeting, Singapore, 2 November 1996