I migliori medici di Chirurgia dell'ernia inguinale - TOP-53medici

Il dottor Vafiy Atalay è un esperto oncologo e chirurgo generale con 17 anni di esperienza. Si specializza in interventi chirurgici sul pancreas, colon e retto, fegato, e svolge anche complesse procedure endoscopiche. Autore di 31 articoli su riviste nazionali e internazionali, ha apportato un contributo significativo alla letteratura medica.

Vincitore del primo premio al concorso di ricerca del 20° Congresso e del premio per il miglior studio al 5° Congresso Chirurgico. Membro della TSS, dell'Associazione Medica Palestinese e della IOA. La sua partecipazione attiva a queste organizzazioni conferma il suo impegno per la crescita professionale e l'eccellenza in chirurgia.

Il medico si è laureato presso l'Università di Istanbul, Facoltà di Medicina di Istanbul nel 2007 e ha completato una specializzazione in chirurgia presso l'Ospedale di Educazione e Ricerca Sisli Etfal nel 2013. Per approfondire ulteriormente la sua esperienza, si è unito alla Clinica di Chirurgia Generale presso l'Università Okan di Istanbul nel 2020.<\/p>

Con una vasta esperienza in varie istituzioni mediche, il medico ha lavorato presso l'Ospedale di Formazione e Ricerca Sisli Hamidiye Etfal, l'Ospedale Statale di Siverek e il Centro Medico Anadolu. È membro di diverse organizzazioni prestigiose, tra cui la Società Europea di Coloproctologia e la Società Chirurgica Turca.<\/p>

Il medico possiede numerose certificazioni, come il Certificato di Qualificazione dell'Associazione Chirurgica Turca, e ha completato corsi avanzati in endoscopia, chirurgia bariatrica e tecniche laser per le malattie emorroidarie.<\/p>

Op. Dr. Merve Karlı has completed her medical education at Eskişehir Osmangazi University Faculty of Medicine, Bakırköy. She received her specialist training at Sadi Konuk Training and Research Hospital.

She has performed over 1000 operations in the fields of benign anorectal diseases, laparoscopic / open hernia surgery, breast diseases, trauma and emergency surgery. She has certifications on endoscopic procedures.

MEDICAL INTERESTS

• Breast Diseases
• Benign Anorectal Diseases
• Laparoscopic and Open Hernia Surgery
• Endoscopy (Gastroscopy, Colonoscopy, PEG Insertion)

I’m Dr. Enrique Pliego Esquivel, a surgeon specializing in bariatric and metabolic surgery with over 8 years of experience transforming lives through advanced surgical solutions. I am proud to be one of the few bariatric surgeons in Mexico who is a member of the American Society for Metabolic and Bariatric Surgery (ASMBS). I am also certified by the Mexican Board of Obesity Surgery and the Mexican College of General Surgery.

My primary focus is providing comprehensive care to patients dealing with obesity, obesity-related conditions such as diabetes and hypertension, as well as managing complications from bariatric surgery. I also treat gastroesophageal reflux and reflux-related esophagitis, offering tailored solutions that significantly enhance my patients' quality of life.

Patients often highlight my professionalism, empathy, and dedication to understanding their unique needs. I take the time to listen and fully grasp their goals because I believe every case deserves a personalized approach and a clear path toward success.

My priority isn’t to see the most patients—it’s to deliver exceptional care and outstanding results for each individual. I am deeply committed to quality, staying accessible, and maintaining close communication with my patients throughout their journey.

If you’re looking for expertise, compassion, and results you can trust, I’m here to help you take the first step toward a healthier, happier life.

Il Prof. Dr. Samet Yardimci è specializzato in chirurgia laparoscopica avanzata e chirurgia gastrointestinale, con formazione presso l'MD Anderson Cancer Center.

• Certificato dal consiglio di amministrazione in Chirurgia Generale con una sottospecializzazione in Chirurgia Gastroenterologica
• Pioniere delle unità di trapianto d'organo e chirurgia delle malattie infiammatorie intestinali
• Ex membro della facoltà presso la Scuola di Medicina dell'Università di Marmara

General and Digestive System Surgeon. Focus on minimally invasive colorectal, proctologic, and abdominal wall surgery. Associate Head, Infanta Elena University Hospital (2021–). Associate Surgeon, Fundación Jiménez Díaz (2013–).

Accreditations: PhD in Surgery, summa cum laude (UAM). Certified in robotic surgery (Da Vinci X/Xi/5). Advanced training in laparoscopic general surgery (IRCAD, Strasbourg). Specialist in General and Digestive Surgery (Fundación Jiménez Díaz).

Achievements: Researcher (2013–). Author of a patent for an abdominal wall prosthetic implantation system (2021). Co‑author of the Rectal Obturator utility model (2021). Peer reviewer, International Journal of Surgery Case Reports (2024–). Thesis tutor (2023–). Publications in Cirugía Española, Experimental Biology and Medicine, Histology and Histopathology, and The American Journal of Surgery. Member of AEC, AECP, and ICOMEM.

Dr. Antoni Krajewski graduated from the Medical University of Łódź. He completed his specialization in the Department of General, Vascular and Oncological Surgery at Międzyleski Specialist Hospital in Warsaw. He continues to practice there.

His work covers general surgery and aesthetic medicine and surgery. He develops his skills through international training and scientific symposia.

He shares his expertise as a trainer in aesthetic medicine. In cooperation with the Luxmed Medical Education Center, he leads courses on the FUE hair transplantation technique.

Dr. Suebpong Angchoun (Dr. Beer) is a urologist and men’s health specialist. He founded Eternity Clinic and is its medical director. He also directs the Urology Center at Bangkok Hospital Phuket. His practice focuses on minimally invasive (endoscopic) urology and male sexual health.

Education and accreditations: M.D. (2003), Prince of Songkla University. Diploma, Thai Board of General Surgery (2008). Diploma, Thai Board of Urology (2011), Prince of Songkla University. Clinical focus: erectile dysfunction, testosterone replacement therapy, kidney stones, and prostate health.

Dr. İlhami Soykan Barlas was born in the year 1977 in Istanbul Moda. He is graduated from Kadıköy Anadolu High School and Cerrahpaşa Faculty of Medicine. He was awarded the title of General Surgery Specialist after completing his general surgery specialization in Okmeydanı Training and Research Hospital in the year 2008. 

He went to Scotland 2 times in the years 2006-2007 and received advanced laparoscopic education. He awarded with ‘Certificate of Appreciation’ by the Ministry of Health of the Republic of Turkey in the year 2009 for his contributions to the establishment of Dr. Lütfi Kırdar Training and Research Hospital Burn Center and for his related works. 

After completing his compulsory service at Kastamonu İnebolu State Hospital between the years 2009-2011, resigned from his duty at the state owned institutions, returned to Istanbul and started to work in private sector. He has been working as kidney transplant and general surgery specialist in Florence Nightingale group of hospitals since the year 2013. Since the year 2017, he has been serving as academic Doctor Lecturer in Faculty of Medicine of Demiroğlu Science University. He has more than 20 articles published in national and international journals in general surgery and kidney transplant and more than 30 proceedings that are submitted in national and international congresses. 

He also has been the book editor and chapter author on kidney transplant and he also has been chapter author in various surgery books. Dr Soykan Barlas has been awarded the title ‘General Surgery Associate Professor’ in the year 2020. Currently, he has been working within the organization of Medical Park Group of Hospitals .

 EXPERIENCES 

 İstanbul Okmeydanı Training and Research Hospital 2003-2008 (Specialization Education ) 

 İstanbul Lütfi Kırdar Kartal Training and Research Hospital 2009 

 İnebolu State Hospital 2009-2011 (Compulsory Service Duty) 

 Private Hospitalium Şişli Hospital 2012-2013 

 Şişli Florence Nightingale Hospital Kidney and Pancreas Transplant Center 2013-2020 

 Demiroğlu Science University Faculty of Medicine Surgery Department Lecturer 2017- Present 

 İstanbul Florence Nightingale Hospital Kidney and Pancreas Transplant Center 2020- Present 

 Private Osmanoğlu Hospital Şişli 2020-2022 Medical Park Göztepe Hospital 2022- present.

SCIENTIFIC ARTICLES 

1.Soykan Barlas,ArzuAkan,YavuzEryavuz,GirayYavuz,SedatKamalı,Gülçin Kamalı: PrimaryHydatidosis of thegluteusmuscle:Report of a caseandreview of theliterature. Ind JSurg.2016; 78(2): 161–162. 

2.Metin Kement, Hakan Ahmet Acar, İlhami Soykan Barlas, Nihat Aksakal, Cem Gezen, Uygar Düzci, Mustafa Öncel: Clinical evaluation of a temporaryfecalcontainmentdevicefornonsurgicalfecaldiversion in perinealburns. Ulus Trauma Emergency Surgery Journal. 2011; 17(2): 123-127 

3.Bilgin Y, Hot S,BarlasIS,AkanA,Eryavuz Y:Short andlongtermresults of harmonicscalpelhemorrhoidectomyversusstaplerhemorrhoidopexy in treatment of hemorrhoidaldisease. Asian J Surg. 2015;38(4):214-9. 

4.Sinangil A, Celik V, Barlas S, Sakaci T, Koc Y, Basturk T, Akin EB, Ecder T. NewOnsetDiabetesAfterKidneyTransplantationandPretransplantHypoma gnesemia.ProgTransplant. 2016 Mar;26(1):55-61. doi: 10.1177/1526924816633949. 

5.Sinangil A, Celik V, Barlas S, Altunrende F, Akin EB, Ecder T. CalcifiedDouble J StentafterSequentialLiverandRenalTransplantationAssociatedtoprim aryOxalosis: Case Report. BANTAO journal, 2015;13(2), 97-99. 

6.Sinangil A, Celik V, Barlas S, KuskuCabuk F, Akin EB, Ecder T. A veryraretumor in a renaltransplantdonorcandidate: primarymesentericneuroendocrinetumor.InternationalJournal Of AdvancesIn Case Reports, 2015;2(4):244-249 

7.Sinangil A, Celik V, Barlas S, Akin EB, Ecder T. Shouldtransplantureter be stentedroutinelyor not?EurRevMedPharmacolSci. 2014;18(23):3551-6. 

8.Sinangil A, Celik V, Barlas S, Koc Y, Basturk T, Sakaci T, Akin EB, Ecder T. Theincidence of newonsetdiabetesaftertransplantationandrelatedfactors: Singlecenterexperience. Nefrologia, 2017;37(2):181-188. 

9.Akin EB, Aydogdu I, Barlas IS. Introducing RobotAssistedLaparoscopicDonorNephrectomyAfterExperienceInHandAssistedRetroperitoneoscopicApproach. TransplantProceedings 2019;51, 2221-222. 

10. Barlas IS, Aydogdu I, Sinangil A, Atan Ucar Z, Koc Y, Sardogan C, Akin EB. IncisionalComplicationsandCosmetic Evaluation AfterHand-AssistedRetroperitoneoscopicDonorNephrectomy. TransplantProceedings 2019; 51, 2215-2220. 

11. Barlas IS, Aydogdu I, Sinangil A, Atan Ucar Z, Koc Y, Ecder T, Akin EB. HandAssistedNephretomyPredisposesIncisionalHerniationInObeseL ivingDonors. TransplantProceedings 2019; 51, 2210-2214. 

12.Sinangil A, Atan Ucar Z, KocY, Barlas IS, Abouzahir S,Ecder ST, Akin EB. TheOutcome of DesensitizationTherapy in Immunologically High-risk KidneyTransplantation: Single-Center Experience. TransplantProceedings 2019; 51, 2268-2273 

13.GodeOguten E, Barlas IS, Akin EB. MentalDistressSymptomsand Life SatisfactionamongLivingKidneyDonors: FrequencyandAssociationwithSubjectiveEvaluations. TransplantProceedings 2019; 51, 2232-2236 

14. Atan Ucar Z,Sinangil A, Koc Y, Barlas IS, AbouzahirS, Ecder T, Akin EB. TheClinicalPrognosis Of TheRenalRetransplantPatients: A Single Center Experience. TransplantProceedings 2019;51, 2274- 2278. 

15. Barlas IS, Demir M, Akın EB. A single-center nineyearexperience in pediatrickidneytransplantation. Cumhuriyet MedicalJournal 2020; 42 (1), 126-135

Dr. Adriana Nowak graduated from the First Faculty of Medicine at the Medical University of Warsaw. She completed specialist training in general surgery at the Department of General, Vascular and Oncological Surgery at Międzyleski Specialist Hospital. She continues to practice there.

She performs general and aesthetic surgical procedures. She also treats chronic wounds with negative pressure therapy. She regularly attends training courses, workshops and scientific congresses. She is a member of the Polish Wound Management Association. She has authored and co-authored articles in medical journals.

Name-Surname: İbrahim Aliosmanoğlu 

DOB: 08.02.1979 

EDUCATION Degree Dept Univercity Year MD Medicine Uludağ Unv.Faculty of Medicine 

1996-2002 Residency programe General Surgery Başkent Unv.Faculty of Medicine 2003-2008 

POST-GRADUATE TRAINING Op.Dr. Surgeon in Şanlıurfa Training and Research Hospital 

2009-2010 Assistant Profesor Dicle Unv.Faculty Of Medicine General Surgery Dept 2010-2013 Associate Profesor Akdeniz Unv.Faculty Of Medicine General Surgery Dept 

2013-2014 Associate Profesor Akdeniz Unv.Faculty Of Medicine General Surgery Dept 

2014-2016 Professor Medicalpark Hospital Complex Organ Transplantation Unit 2019- He has performed over 2000 various hepatobiliary surgeries with %95 success ratio and 1000 liver transplantation surgeries with %90 success ratio 

ROJECTS 1. Effect of ellagic aside on experimental intraabdominal addsions on rats,Research Project, Dicle Unv Scientific Research Project (2012/38), 2012. 

2. Effect of erythropoetinon serum and liver zinc-copper levels on rats experimental obstructive jaundice. Research Project, Dicle Unv Scientific Research Project (2011/42), 2011. 

3.The protective effect of cafeic asside phenyl ester on rats pancreatic an hepatic damage due to izoniazide and riphampicine.Research project Dicle Unv Scientific Research Project (2010/26), 2010. 

MANAGEMENT İSSUES 

Responsible of Kidney Transplantation of Dicle Unv Hospitals– 2011 Responsible of Akdeniz University Hospital Hastanesi Liver-Kidney-Pancreas Transplantation Unit (2015) Manager of Akdeniz University Hospital Hastanesi Liver-Kidney-Pancreas Transplantation Unit (2015) 

Il medico è un chirurgo generale esperto con una vasta esperienza in varie istituzioni prestigiose. Il medico è stato affiliato alla Clinica di Chirurgia Generale dell'Università Medipol di Istanbul e ha contribuito alla Società Turca di Chirurgia del Colon e del Retto e alla Società Turca di Chirurgia dell'Ostomia. Il medico ha anche un background nella Società di Chirurgia Gastrointestinale di Malatya.<\/p>

L'istruzione include una laurea in medicina presso l'Università Tecnica di Karadeniz, Facoltà di Medicina, e una formazione in chirurgia generale presso l'Ospedale di Formazione e Ricerca Dr. Lütfi Kirdar di Istanbul Kartal.<\/p>

Dr. Yoon Shik Kang, M.D., Ph.D., is President and Founder of Gibbeum Hospital, Korea’s only surgical‑specialty general hospital. Dr. Kang is a pioneer in hernia and colorectal surgery. He has over 30 years of experience and has performed more than 40,000 operations, including over 20,000 mesh‑free hernia repairs. He was ranked the No. 1 proctology specialist by Dong‑A Ilbo. He received the 2016 Hanmi True Medical Award.

Dr. Kang developed the Kang Repair, a mesh‑free hernia surgery. It avoids synthetic mesh and foreign‑body risks. Reported recurrence is under 0.2%, and chronic pain is under 0.5%. The procedure uses local anesthesia and a small incision. Recovery is fast, and early travel is possible. It is often safer for older adults and patients with other conditions. Dr. Kang earned his bachelor’s, master’s, and Ph.D. in Medicine from Seoul National University College of Medicine. He was a colorectal research fellow at St. Mark’s (1993–1994). He has been an invited speaker at the Japanese Society of Coloproctology and a presenter at the 100th ASCRS. Patients have come from more than 56 countries.

La Dott.ssa Pekize Eker Balcioglu è specializzata in chirurgia generale con un focus su tecniche minimamente invasive, formata presso l'Università di Marmara.

• Laureata presso la Facoltà di Medicina dell'Università di Istanbul Cerrahpaşa
• Ha completato la specializzazione presso il Dipartimento di Chirurgia Generale dell'Università di Marmara
• Autrice di articoli in riviste locali e internazionali
• Ha partecipato a numerosi congressi locali e internazionali

Dr. Javier Centeno obtained his Doctorate in Medicine and Surgery from the University of Barcelona in 1988 and completed his specialization in General and Gastrointestinal Surgery at the Hospital de Mutua de Terrassa between 1989 and 1993.

Afterwards, Dr. Centeno completed additional training in the colorectal surgery department at the Mayo Clinic de Rochester, Minnesota (USA). Since 1993, Dr. Centeno has been a leading specialist in the surgery department at the Teknon Medical Center.

Clinical and scientific work:

Co-organizer of the Seminar on Endorectal Ultrasound Diagnostics. Advances in Colon, Rectum and Anus Surgery. Barcelona. March 1995.

"Visiting Surgeon" in the Department of Colorectal Surgery, Cleveland Clinic Florida, Fort Lauderdale, Florida, USA, February 1996.

Advanced Course in Laparoscopic Colorectal Surgery. ICARD. EITS, Strasbourg. November 2002.

Postgraduate student, associate professor of the Department of Urogynecoproctological Physiotherapy.

School of Nursing and Physiotherapy, University of Blanquerna. Ramon Llull University. Barcelona. 2003 2015

Accreditation by ERAS-Society (Sweden) in 2016.

Member of scientific communities:

Asociación Española de Cirujanos

· Societat Catalana de Cirurgia

· American Society of Colon and Rectal Surgeons y de la University of Minnesota Alumni Association.

Il medico è un chirurgo generale presso l'Anadolu Medical Center dal 2006, specializzato nel cancro al pancreas. Ha completato la sua formazione medica presso la Facoltà di Medicina dell'Università di Fırat e si è ulteriormente specializzato in chirurgia generale presso il Dr. Lütfi Kırdar KEAH a Istanbul nel 2003. Con esperienza in vari centri sanitari e ospedali, ha anche servito come professore assistente e coordinatore assistente presso la Scuola di Medicina dell'Università di Maltepe. Il medico ha partecipato a corsi avanzati, tra cui il Corso di Chirurgia Citoriduttiva & Hipec e il Programma di Formazione in Chirurgia Robotica da Vinci.<\/p>

Personal Information:

• Born in 1967.
• Completed primary education in Istanbul.
• Graduated from Pertevniyal High School in 1984.

Education & Training:

• Enrolled in Marmara University Faculty of Medicine in 1984, completing medical education in English and graduating in 1991.
• Started General Surgery residency at Istanbul University Faculty of Medicine in 1991.
• Became a General Surgery Specialist in 1996 with a thesis on "The Effects of Inhibiting the Nitric Oxide Pathway in Radiation Enteritis."
•  

Professional Experience:

• 1996: Joined Şişli Florence Nightingale Hospital as a General Surgery staff doctor.
• 2002-2004: Served as a Lecturer and Acting Head of the General Surgery Department at Kadir Has University Faculty of Medicine.
• 2013: Transferred to Istanbul Florence Nightingale Hospital as a General Surgery specialist, where he continues to work.
•  

Medical Expertise & Achievements:

• Performed the first general surgery operation in Turkey using the Da Vinci robotic system.
• Specializes in advanced laparoscopic and robotic surgery and continues to perform such procedures.

Positions Held:

• 1991-1996: Research Assistant – Istanbul University, Faculty of Medicine, Department of General Surgery.
• 1996-2012: General Surgery Specialist – Şişli Florence Nightingale Hospital.
• 2002-2004: Lecturer – Kadir Has University, Faculty of Medicine, Department of General Surgery.
• 2003-2004: Acting Head – Kadir Has University, Faculty of Medicine, Department of General Surgery.
• 2013-Present: General Surgery Specialist – Istanbul Florence Nightingale Hospital.

Interests 
Robotic surgery,
Advanced laparoscopic surgery(Colorectal and GERD Surgery included),
Laparoscopic hernia surgery,
Breast and thyroid surgery,
Gastrointestinal surgery,
Anal region diseases,
Hepatobiliary surgery

Memberships: 

Turkish Medical Association

Turkish Surgical Society

American Society of Colon and Rectal Surgery

Membership in societies:

Expert of scientific journals 

Close co-operation with leading surgeons

Membership of the German Medical Association 

Specialities:

Introduction of new and modern techniques in the field of oncological surgery
General and visceral surgery

Minimally invasive surgery

Gastrointestinal oncology surgery

Oncological surgery

Haemorrhoids treatment

Additional clinical specialisation in minimally invasive and hernia surgery

Surgery and transplantation of the pancreas

Work Experience:

2005: Specialist in the field of surgery

2008: Appointed Senior Consultant specialising in pancreatic surgery and transplantation

2010: Coordinator of the Pancreatic Cancer Centre (Oncocert)

2013: Specialist in visceral surgery

2014: Managing Senior Physician, additional clinical specialisation in minimally invasive and hernia surgery

2019: Chief Surgeon of the Colorectal Cancer Centre Bochum (the first certified colorectal cancer centre in Germany and one of the first certified leading colorectal centres in Europe)

2021: Chief Surgeon of the Department of Surgery at the Academic Hospital Solingen

Thanks to the professor and his team, the department has been modernised by introducing modern surgical methods of treatment and especially improved methods of post-operative recovery. The Department of Surgery at the Solingen Clinic is now further expanding its focus on minimally invasive surgery in the direction of robotics. The clinic has allocated a huge budget for the purchase of state-of-the-art equipment in order to offer patients a full range of surgical methods for the treatment of benign and malignant diseases of the oesophagus, lungs, stomach, liver, pancreas and intestines according to current guidelines and using the most modern technical equipment.

Professor Schenker is an active researcher and lecturer. He lectures at medical universities and organises seminars and workshops for colleagues. He cooperates closely with the Cancer Centre, the Pancreatic Cancer Treatment Centre, the Intestinal Cancer Treatment Centre and the Interregional Trauma Centre.

Il Dr. Harald Rosen è specializzato in chirurgia endoscopica minimamente invasiva, portando decenni di esperienza nelle procedure gastrointestinali complesse alla Wiener Privatklinik.

• Certificato in gastroenterologia e medicina interna
• Esperto in endoscopia diagnostica e terapeutica
• Esegue resezioni endoscopiche avanzate per i tumori gastrointestinali
• Membro delle principali istituzioni mediche di Vienna

Prof. Dr. Alaettin Çelik graduated from Adapazarı İlyaslar Primary School in 1960, from Haydarpaşa High School in 1966, and from Istanbul University Faculty of Medicine in 1972. In the same year, he became an assistant in the 2nd Surgery Department of the Faculty of Medicine. Between November 1975 and February 1976, he completed his military service for 4 months at the Gelibolu Military Hospital as a Reserve Officer. In 1977, he became a General Surgery Specialist in the Department of Surgery.

To establish the pediatric surgery department at the faculty and to specialize further, he worked as a registrar at the University of London's "The Hospital for Sick Children" from 01.12.1978 to 01.12.1980. After returning to the faculty, he continued his pediatric surgery studies and became an associate professor in 1982.

In the same year, he was appointed as the founding chairman of the Pediatric Surgery Department at Istanbul Faculty of Medicine on 06.09.1982. He established the department, which included a 30-bed inpatient unit, an ICU, a polyclinic, and an operating room for students, assistants, and specialists. In 1988, he became a professor. In addition to leading the Pediatric Surgery Department, he served as the Vice President of the Department of Surgical Medical Sciences between 1990 and 1995. From 1995 to 1998, he was the Head of the Department of Surgical Medical Sciences at Istanbul Faculty of Medicine.

He is a specialist in General Surgery, Pediatric Surgery, and Pediatric Urology. He has numerous cited and published clinical and experimental research articles, case reports, expert theses, and free papers presented at domestic and international congresses. He is the author of several books, including Pediatric Surgery Book of Pediatric Surgery (2014), Newborn Surgery (2008), and Pediatric Surgery Book (2013).

He is a member of various professional medical associations, including the Turkish Ministry of Health Pediatric Surgery Society. He established, developed, and trained a large number of students, assistants, specialists, and faculty members at the Istanbul Faculty of Medicine, Department of Pediatric Surgery. He left the Department of Pediatric Surgery in 2013 and retired due to age limits on 16.03.2016. His contracted working period at the same faculty ended on 22.10.2016. He continues to work as a Pediatric Surgery Specialist at Istanbul Florence Nightingale Hospital and participates in weekly meetings of the Council of Children's Tumors.