24

COUNTRIES VISITED

32

SUCCESSFUL MISSIONS

2580+

SURGEONS AND NURSES TRAINED

606

LIFE-CHANGING SURGERIES

ABOUT CTO MISSIONS

Conversation with Dr. Marc Levitt | CTO Founder & Pediatric Surgeon

Conversation with Julie Choueiki | Director of Nursing and Education

Upcoming missions

Ho Chi Minh City, vietnam 2025

Including Pediatric Colorectal and Pelvic Reconstruction Course! Program

December 8 - 12, 2025

nairobi, kenya 2026

March 9 - 13, 2026

Alexandria, egypt 2026

June 25 - 30, 2026

Riyadh, Saudi arabia 2026

June 30 - July 1, 2026

Mumbai, india 2026

October 19 - 23, 2026

previous missions

San Pedro Sula, Honduras 2007

22 surgeries performed alongside local surgeons and nurses

San Pedro Sula, Honduras 2008

20 surgeries performed alongside local surgeons and nurses

Addis Ababa, Ethiopa 2009

24 surgeries performed alongside local surgeons and nurses - 50 course attendees representing 5 countries

Accra, Ghana 2010

24 surgeries performed alongside local surgeons and nurses - 50 course attendees representing 5 countries

Accra, Ghana 2011

22 surgeries performed alongside local surgeons and nurses

Cape Town, South Africa 2013

30 surgeries performed alongside local surgeons and nurses - 80 course attendees representing 10 countries

GuangZhou, CHINA 2013

33 surgeries performed alongside local surgeons and nurses - 100 course attendees from the surrounding areas

Cape Town, South Africa 2014

30 surgeries performed alongside local surgeons and nurses - 50 course attendees from the surrounding areas

San Jose, Costa Rica 2015

20 surgeries performed alongside local surgeons and nurses - 50 course attendees representing 5 countries

Zagreb, Croatia 2016

22 surgeries performed alongside local surgeons and nurses - 60 course attendees representing 7 countries

Melbourne, australia 2016

10 surgeries performed alongside local surgeons and nurses - 150 course attendees representing 3 countries

St. Petersburg, Russia 2017

20 surgeries performed alongside local surgeons and nurses - 60 course attendees representing 3 countries

Lima, Peru 2017

23 surgeries performed alongside local surgeons and nurses - 70 course attendees representing 6 countries

Cape Town, South Africa 2017

18 surgeries performed alongside local surgeons and nurses - 100 course attendees representing 10 countries

Barcelona, spain 2017

12 surgeries performed alongside local surgeons and nurses - 100 course attendees representing 10 countries

San Pedro Sula, Honduras 2018

25 surgeries performed alongside local surgeons and nurses

Yerevan, Armenia 2019

12 surgeries performed alongside local surgeons and nurses - 40 course attendees representing 4 countries

San Jose, Costa Rica 2019

22 surgeries performed alongside local surgeons and nurses

Da Nang, Vietnam 2019

21 surgeries performed alongside local surgeons and nurses - 250 course attendees representing 4 countries

Athens, Greece 2019

42 surgeries performed alongside local surgeons and nurses - 200 course attendees representing 3 countries

Athens, Greece 2022

15 surgeries performed alongside local surgeons and nurses - 50 course attendees representing 3 countries

Pecs, Hungary 2023

16 surgeries performed alongside local surgeons and nurses - 100 course attendees representing 7 countries

TBILISI, GEORGIA 2023

14 surgeries performed alongside local surgeons and nurses - 40 course attendees representing 5 countries

OSLO, NORWAY 2023

12 surgeries performed alongside local surgeons and nurses - 150 course attendees representing 4 countries

prague, czech republic 2024

12 surgeries performed alongside local surgeons and nurses - 80 course attendees representing 5 countries

Johannesburg, south africa 2024

13 surgeries performed alongside local surgeons and nurses - 150 course attendees representing 8 countries

CARTAGENA, COLOMBIA 2025

8 surgeries performed alongside local surgeons and nurses - 80 surgical and nursing conference attendees from 9 countries

sao paolo, brazil 2025

24 surgeries performed alongside local surgeons and nurses - 120 course attendees from all over Brazil

Abidjan, Côte d’Ivoire 2025

17 surgeries performed alongside local surgeons and nurses - 50 course attendees from 16 countries

Budapest, Hungary 2025

6 surgeries performed alongside local surgeons and nurses - 20 course attendees

SIngapore 2025

5 surgeries performed alongside local surgeons and nurses - 220 course attendees from 8 countries

Manila, Philippines 2025

12 surgeries performed alongside local surgeons and nurses - 110 course attendees from all over Philippines

ABOUT the CTO MISSION 2025 IN manila, Philippines

From our host, Dr Henson, in the Philippines:

Our deepest gratitude to the CTO Team for your selfless act of service to the Filipino children living with anorectal malformations and Hirschsprung’s disease. Your dedication has brought healing, hope, and dignity to so many young lives, while your commitment to educating and empowering health professionals ensures that this impact will reach far beyond today. We are truly inspired by your compassion, generosity, and unwavering service to our children and our country.

Lissa Henson, MD
Director, CTO Philippines
Pediatric Surgeon, Philippine Children's Medical Center

I am grateful to have had this experience with everyone here. We are surrounded by compassionate and talented providers and what an honor it is to stand next to all of you and be able to help children from all over the world. Some on this trip and some who we may never meet. I wish everyone safe travels and look forward to next time. 

Lissa, words cannot express how thankful we all are for your hospitality. You are an incredible surgeon but also an impeccable host. Thank you.

Katie Worst
Advanced Practice Clinical Manager
Colorectal Program
Children’s National Hospital

I just wanted to express my gratitude to all of you for making this an incredible experience and for the passion you pour into caring for those who need us and for educating our colleagues.  These trips always remind me of how lucky we are to get to work with such compassionate and talented people. Thank you to all who have made this experience possible.  All the best to the team heading to Vietnam and safe travels to those heading home.

Lissa, thank you for all of your hospitality and impeccable execution.  

Jeffrey Avansino, MD
Pediatric surgeon
Seattle Children's Hospital
Professor of Surgery at the University of Washington

ABOUT the CTO MISSION 2025 IN Singapore

Opening speech for the Paediatric Colorectal and Pelvic Reconstruction Workshop Singapore, 1-2 December 2025

Good morning everyone,

I am Han Lim, and it is my great pleasure to welcome all of you to the Paediatric Colorectal and Pelvic Reconstruction Surgery Workshop with Visiting Experts.

First and foremost, we are deeply grateful to our donors of the Paediatric Bowel and Bladder Programme Fund, which has underwritten this entire event, enabling us to organise this workshop without any registration fee. The fund was started by a network of close friends, who, together with the Paediatrics Surgery team at KKH, wanted to do much more to help children with bowel and bladder conditions, both in Singapore and beyond. My sincere thanks also go to my department for their unwavering support in making this event possible.

I first met Marc in 2018 at Great Ormond Street Hospital, where I completed my fellowship. I still remember assisting him in a Swenson pull-through — my very first time seeing the procedure performed live. Earlier this year, I was fortunate to have a short attachment at Children’s National Hospital in Washington, where I met a truly comprehensive and inspiring team, including dedicated nurse practitioners who give their all to support children with colorectal conditions.

Through this philanthropic fund, we have also been able to bring together a team of nurses in KKH who are equally committed to caring for children with bowel management needs.

For this workshop, Marc has brought along an outstanding group of experts: Christina, Payam, Chris, Marieke, Nanci, and Emma. We also warmly welcome participants joining us from across the region — Malaysia, Indonesia, Thailand, Brunei, the Philippines, Papua New Guinea, India, and Hong Kong.

Over the next two days, we will have four live cases running concurrently across two operating theatres on Day 1, followed by a series of lectures and discussions led by our visiting experts covering a wide range of paediatric colorectal topics. We have also arranged a separate nursing track, recognising the vital role our nurses play.

As good stewards of the donated funds, our department is running this workshop entirely in-house. Please feel free to approach any of us if you have questions or need assistance at any point.

Lastly, I want to thank each of you for being here. I hope these two days will be a valuable opportunity for all of us to learn, share, and continue improving the care we provide to children.

With that, I would like to invite our Head of the Department of Paediatric Surgery, Dr Li Wei, to come on stage.

Thank you

Dr Ong Han Lim (MBBS, MRCS, FAMS)

Consultant
Department of Paediatric Surgery,
Duke-NUS Pelvic Floor Disorders Centre,
KK Women's and Children's Hospital, Singapore

Clinical Assistant Professor,
Duke-NUS Medical School, Singapore

Adjunct Senior Lecturer,
Lee Kong Chian School of Medicine, Singapore

ABOUT the CTO MISSION 2023 IN TBILISI, GEORGIA

Conversation with Dr. Marc Levitt | Pediatric Surgeon

Conversation with Ivo de Blaauw | Pediatric Surgeon

ABOUT the CTO MISSION 2022 IN ATHENS, GREECE

Conversation with Dr. Alexander Passalidis | Pediatric Surgeon

Conversation with Thanos Tyraskis | Pediatric Surgeon

REACH OUT TO US