9 бет - Түркияда УДЗ-ға бойынша ең жақсы дәрігерлер – ТОП-247 дәрігерлер

Education

GATA Faculty of Medicine, Doctor of Medicine Education, 1984, Ankara/Istanbul
GATA Faculty of Medicine, Neurology Residency, 1992, Ankara/Istanbul

Experience

GATA Neurology Department Specialization Student (1987-1992, Ankara/Turkey)
GATA Neurology Department Assistant Professor (1992-1995, Ankara/Turkey)
KüTahya Air Hospital Neurology Specialist and Chief Physician (1995-2003, Kütahya/Turkey)
Şişli Memorial Hospital Neurology Specialist (2004-2021, Istanbul/Turkey)

I completed my primary, secondary and high school education in Konya, my hometown, and my medical school and medical specialty education in Ankara GATA. I received flight medicine training and worked as a flight physician in the military and civilian sectors. I received beginner and advanced photography training and opened 4 photography exhibitions. I have made photography studies in 56 countries in Turkey and in 56 countries that I had the opportunity to visit.

Scientific Memberships

Turkish Medical Association
DGCA Health Board Membership

Education

Doctor: Kilis Merkez No. 1 Health Center, 2006-2008
Assistant Doctor: Mersin University Faculty of Medicine, 2009-2013
Specialist Doctor: Bingöl Genç State Hospital, 2013-2014
Minor Assistant: Akdeniz University Faculty of Medicine, 2014-2017
Minor Specialist: Erzurum Regional Training and Research Hospital, 2017-2018
Subspecialist: Gaziosmanpaşa Training and Research Hospital, 2018-2020
Attending Specialist: Başakşehir Çam and Sakura City Hospital, 2020-2022
Associate Professor: Başakşehir Çam and Sakura City Hospital, 2023
Associate Professor: Istinye University Medicalpark Gaziosmanpaşa Hospital, 2023-2024

Scientific Memberships

Turkish Pediatric Society
Turkish Society for Pediatric Gastroenterology Hepatology and Nutrition
ESPGHAN - European Society for Pediatric Gastroenterology Hepatology and Nutrition.

Medical Intrests

• 
  -Irritable (Restless) Bowel Syndrome
• -Food allergies associated with the digestive system
• -Constipation, faecal incontinence
• -Acute and chronic diarrhoea, malabsorption
• -Chronic abdominal pain
• -Gastroesophageal reflux disease
• -Celiac disease
• -Ulcerative colitis, Crohn's disease
• -Treatment before and after liver transplantation
• -Acute and chronic pancreatitis

Professor Dr. Cenap Zeybek is a respected Pediatric Cardiologist known for his skill in advanced heart procedures. He became an Associate Professor in 2011. In 2017, he was promoted to Professor. This shows his expertise and leadership in pediatric cardiology. Dr. Zeybek has performed many complex surgeries, such as heart valve replacements, open heart operations, and interventional procedures. His work has helped improve outcomes for children with heart conditions.

He has published many scientific articles and given several presentations. This shows his dedication to improving pediatric heart care. Dr. Zeybek’s qualifications and academic success make him a leading expert in his field.

Dr. Kemal Raşa is a highly experienced General Surgeon specializing in Modern Thyroidology & Laparoscopic Surgery with 23 years of experience. He is affiliated with several medical associations and has published several papers in his field.

Education

Undergraduate: Faculty of Medicine, Gazi University, 2004-2010
Internship Abroad: Erasmus University Erasmus Medical Center, Rotterdam, 2007
Residency in Medicine: Department of Obstetrics and Gynecology, Gazi University, 2011-2016
Minor Specialization: Gynecologic Oncology Surgery, Erciyes University, 2018-2021
Advanced Cancer Surgery Training: Charité - Universitätsmedizin Berlin, 2019-2020
Ph: Molecular Oncology, University of Health Sciences, 2023-present

Experience

Associate Professor Doctor: Tekirdag Dr. Ismail Fehmi Cumalioglu City Hospital, Gynecologic Oncology Surgery Clinic, 2024-present
Gynecologic Oncology Surgery Specialist: Tekirdag Dr. İsmail Fehmi Cumalıoğlu City Hospital, 2021-2024
Gynecology and Obstetrics Specialist: Sarıkamış State Hospital, 2017-2018
Gynecology and Obstetrics Specialist: Ankara Keçiören Occupational Diseases Hospital, 2016-2017.

Medical Interests

• Advanced gynaecological cancer surgery
• Minimally invasive laparoscopic gynaecological surgeries
• Minimally invasive laparoscopic gynaecological cancer surgery
• Robotic surgeries
• Deep infiltrative endometriosis surgery
• Patient education, rehabilitation-prehabilitation before and after surgery in cancer patients
• Planning preventive treatments for lymphoedema in cancer patients
• ERAS (Enhanced Recovery after Surgery)- Rapid recovery after surgery
• HPV diagnosis and treatment methods
• Colposcopy
• Use of molecular oncology and tumour immunology principles in surgical practice
• Use of artificial intelligence in gynaecological cancers
• Improving international communication between colleagues in gynaecological oncology
• Surgical management of high-risk pregnancies with placental adhesion anomaly/placenta accreta spectrum

Dr. Kamran Aghayev is a neurosurgeon with over 23 years of experience. He specializes in complex brain and spine surgeries. Dr. Aghayev has performed more than 5,000 successful procedures. He is known for creating new surgical techniques, including the Posterior Upper Rib Excision & Decompression (PURED) method for Thoracic Outlet Syndrome.

Dr. Aghayev holds several US patents for spinal surgery devices. He has published more than 50 scientific papers. He treats brain tumors, hydrocephalus, AVMs, pituitary adenomas, and spinal conditions such as herniated discs, scoliosis, and spinal tumors.

Education:

• Higher Education (6 Years): Marmara University Faculty of Medicine, 2001
• Specialization in Medicine: Istanbul University Istanbul Faculty of Medicine, 2007
   

Experience:

• Faculty of Medicine, University of Rostock, Department of Cardiac Surgery - Research Assistant, August 2007 - August 2008
• King Faisal Specialist Hospital and Research Center, King Faisal Heart Institute - Fellow, August 2008 - October 2008
• Private Göztepe Şafak Hospital, October 2008 - April 2009
• Private Esnaf Hospital, May 2009 - March 2010
• Düzce Atatürk State Hospital, March 2010 - September 2011
• Private Anadolu Medical Center Hospital, October 2011 - June 2013
• Istanbul University Istanbul Faculty of Medicine, July 2013 - December 2018
• Istanbul Medipol University Faculty of Medicine, January 2019 - April 2023
• Biruni University Faculty of Medicine, April 2023 - Present
•  
• Professor: December 18, 2020
• Associate Professor: April 16, 2015-December 18, 2020
• Specialist Doctor: November 2009- April 16, 2015
• Research assistant: June 2002 - July 2007
• Faculty of Medicine: Marmara University - English (1995-2001)[Diploma Grade: 75/100] - Listed in the World Directory of Medical Schools.

Awards:

Second best oral presentation award: Didem Melis Öztaş, Mert Meriç, Metin Onur Beyaz, Mehmet Akif Onalan, Shiraslan Bakhshaliyev, Kıvılcım Sönmez, Kerem Oter, Sedat Ziyade, Beyhan Ömer, Ufuk Alpagut, Murat Uğurlucan. Investigation of the Effect of Erythropoietin on Stem Cell Levels in Cardiovascular Tissue in Diabetic Rats. 19th National Vascular and Endovascular Surgery Congress, Kyrenia, Cyprus, October 26-29, 2019.

Education

• Undergraduate: Faculty of Medicine, Istanbul University, 1982-1988
• Specialization: Obstetrics and Gynecology, Istanbul University Cerrahpaşa Faculty of Medicine, 1988-1992
• Post-Specialty Training: Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Yale University School of Medicine, 1995-1996

Experience

• Clinic Chief: Istanbul University Cerrahpaşa Faculty of Medicine, Department of Obstetrics and Gynecology, 1993-1997
• Associate Professor: Istanbul University Cerrahpaşa Faculty of Medicine, Department of Obstetrics and Gynecology, Reproductive Endocrinology, 1997-2003
• Professor: Istanbul University Cerrahpaşa Faculty of Medicine, Department of Obstetrics and Gynecology, Reproductive Endocrinology, 2003-2019
• Professor Doctor: Bezmialem Vakif University Faculty of Medicine, Department of Obstetrics and Gynecology, 2020-2022
• Professor Doctor: Biruni University Faculty of Medicine, Department of Obstetrics and Gynecology, 2023-present

"Consultant Physician"

He was born in 1965 in Istanbul. In 1982, he graduated from Kabataş High School for Boys. After graduating from Istanbul University Faculty of Medicine in 1988, he completed his specialization in Obstetrics and Gynecology at Istanbul University Cerrahpaşa Faculty of Medicine, Department of Obstetrics and Gynecology. He became an associate professor at Cerrahpaşa Medical Faculty in 1993 and became a professor in 2003. She is interested in Reproductive Medicine and Surgery, Infertility, endometriosis and adenomyosis and has many studies, articles and trainings on these topics. H-index (14.08.2023) Google Scholar: 30, Scopus (Elsevier): 23. He is the founder of Endometriosis and Adenomyosis Association of Turkey. He has participated and organized many international scientific meetings on endometriosis.

Medical Intrests

• Reproductive Endocrinology
• Endometriosis
• Polycystic Ovary Syndrome
• Contraception
• Menopause
• Infertility
• In Vitro Fertilisation (IVF)
• Endoscopic Surgery
• Laparoscopy
• Hysteroscopy

Dr. Hilmi Apak is a respected pediatric hematology-oncology specialist with more than 21 years of experience. He is trained in pediatric oncology. Dr. Apak has led advanced treatments, including bone marrow transplantation, leukemia chemotherapy, and CAR T-cell therapy.

He has published 75 international medical articles, showing his strong contribution to pediatric oncology research. Dr. Apak has worked as assistant editor for the Turkish Pediatrics Archives Periodical. He has also held important academic and leadership positions, such as Head of Pediatric Hematology-Oncology at Istanbul University-Cerrahpaşa.

Areas of Interests

• Infertility
• In Vitro Fertilization (IVF) Treatment
• Endometriosis
• Urogynecology (urinary incontinence and uterine prolapse surgeries)
• Gynecological Laparoscopic surgeries
• Hysteroscopic surgeries
• Pregnancy Monitoring
• Myoma surgery
• Ovarian cysts and surgeries
• Gynecological plastic surgeries

Education:

• Ataturk University Faculty of Medicine - Undergraduate
• Abant Izzet Baysal University Faculty of Medicine Gynecology and Obstetrics - Specialization
• Bezmialem Vakif University Faculty of Medicine Istanbul - Assistant Professorship
• Bezmialem Vakif University Faculty of Medicine Istanbul - Associate Professorship
• American Hospital - Assisted Reproductive Specialist Training

Experience:

• Bolu Izzet Baysal State Hospital (Compulsory Service) -Bolu
• Bezmialem Vakif University Faculty of Medicine - Istanbul

Areas of Interests

• Demyelinating Diseases and MS
• Peripheral Neuropathy and Motor Neuron Disease (ALS)
• Neuromuscular Junction Diseases (MG)

Education 

• M.Sc. Faculty of Medicine, Ondokuz Mayıs University  1990
• Specialization in Medicine  Neurology,  Ankara Training and Research Hospital 1997
• Minor Specialization  Clinical Neurophysiology, Medical Specialization Board 2011

Experience

• Doctor MoH Kastamonu and Samsun Health Center No. 7 1990-1992
• Dr. Res.Assist. Ankara Training and Research Hospital Neurology Clinic 1992-1997
• Assoc. Dr. Abant İzzet Baysal University Düzce Faculty of Medicine 1999-2006
• Assoc.Dr. Duzce University Faculty of Medicine 2007-2011
• Prof.Dr  Duzce University Faculty of Medicine  2011-

Areas of Interests

• Neuro-oncological surgery
• Spinal Surgery
• Pediatric Neurosurgery
• Peripheral Nerve Surgery
• Functional Neurosurgery and Algology

Education:

• Istanbul University, Faculty of Medicine
• Istanbul Okmeydani Training and Research Hospital

Experience:

• Liv Hospital Ulus
• Sisli Kolan Hospital
• Prof.Dr.Cemil Taşcıoğlu City Hospital
• Ardahan State Hospital

Research:

• Tumor markers and other laboratory findings in brain tumors
• Antiepileptic drugs in operated brain tumors
• Cervical corpectomy techniques
• Pre-emptive analgesia in spine surgeries

Publications:

• Uysal E, Cine HS, Yavuz AY, Cal MA. Impact of subventricular zone interaction on clinical outcomes in patients with intracerebral hematoma. Experimental Biomedical Research, 2024;7(3): 117–126. https://doi.org/10.30714/j-ebr.2024.215
• Çal MA, Yangı K. A Single-center Study Comparing Volumetric and Morphometric Measurements of Chiari Malformation in the Turkish Population. Eur Arc Med Res.2024 Mar;40(1):50-56. doi:10.4274/eamr.galenos.2024.24892.
• Avcı İ, Başkurt O, Şeker S, Kurtuluş Y, Çal MA. Rapid Recurrence of Glioblastoma After 12 Days Despite Gross Total Resection. Eur Arc Med Res.2024 Mar;40(1):62-65. doi:10.4274/eamr.galenos.2024.48615.
• Play MA. The relationship between vertebral compression rates and systemic inflammatory scores in osteoporotic vertebral fractures. Eur Rev Med Pharmacol Sci. 2024;28(3):959-968. doi:10.26355/eurrev_202402_35333
• Çal MA, Gök H. Retrospective Evaluation of the Effect of Surgery and CyberKnife on Recurrence and Neurological Deficits in Cases Diagnosed as Vestibular Schwannoma. Haydarpasa Numune Med J.2023;63 (1), 62 ‑67.doi:10.14744/hnhj.2022.45712
• Uysal E, Çal MA, Cine HS. The use of vancomycin powder in the compound depressed skull fractures. Clin Neurol Neurosurg. 2023;225:107570. doi:10.1016/j.clineuro.2022.107570
• Gök H, Şeker S, Peker HO, Çal MA, Altay T, Çelik S. A rare case report: Cervical subcutaneous and mediastinal emphysema due to mastoid fracture. A rare case report: Cervical subcutaneous and mediastinal emphysema due to mastoid fracture. Ulus Travma Emergency Surgery Journal . 2020;26(2):328 ‑330. doi:10.14744/tjtes.2019.02828
• Çınar N,Karaoğlan A,Midi A,Çal MA,Kelten B,Çakmak MA,Şahin Ş. Neuroprotective effect of ziprasidone: Preliminary results compared to haloperidol. J. Exp. Clin. Med ., 2014; 31:71 ‑75. doi : 10.5835/jecm.omu.31.02.002
• Karaoglan A, Cal MA, Orki A, Arpaozu BM, Colak A. Pneumorrhachis associated with bronchial asthma , subcutaneous emphysema and pneumomediastinum . Turkish Neurosurg . 2011;21(4):666 ‑668.
• Kelten B, Karaoğlan A, Cal MA, Akdemir O, Karancı T. Human immunodeficiency Bilateral epidural puncture in a patient infected with the virus Hematoma : Case report [ Bilateral epidural hematoma in a patient with Human immunodeficiency virus infection : a case report ]. Ulus Trauma Emergency Surgery Journal . 2013;19(3):267 ‑270. doi: 10.5505 /tjtes.2013.49799
• Karaoglan A, Akdemir O, Cinar N, et al. Correlation between leptin and pro- ‑inflammatory cytokines in cortical contusion injury model. Ulus Trauma Emergency Surgery Journal . 2011;17(4):298 ‑302. doi: 10.5505 /tjtes.2011.69077
• Cal MA, Kelten B, Akbas A, Akdemir O, Karaoglan A. Coexistence of spinal lipoma, ependymal cyst and dermoid cyst in neighboring localizations in context medullaris : A case report . HealthMed . 2013; 7(12):3227
• Canpolat A, Duman H, Akbaş A, Çal MA, Akdemir AO. Diffuse dysphagia and myeloradiculopathy presenting idiopathic skeletal hyperosteosis ( Forestier Disease). TC Maltepe University Medical Faculty Journal.2012;4(2),14 ‑17
• Karaoglan A, Kelten B,Akdemir AO,Çal MA. Lumbar spine presenting with radiculopathy spinal Chondroma : Case report. TC Maltepe University Medical Faculty Journal. 2011;3(3),28 ‑30
•  
• Istanbul Medical Chamber
• Turkish Neurosurgery Association
   

Areas of Interests

• Pediatric Genitourinary Reconstrictive Surgery
• Hypospadias
• Circumssion
• Oncological Surgery
• Congenital Abnormalities of Upper and Lower Urinary System
• Newborn Surgery
• Pediatric Abdominal Surgery

Education
 

• 1997 -  19 Mayıs University
• 1998 National Pediatric Surgery Congress Best Reearch Study
• 2001-  Kocaeli University
• 2007 – Kosova Government
• 2009 – Yeditepe University
• 2009 – Suudi Arab be Congeress Best Clinical Study

Experience
 

• FMV Işık Highschool
• İstanbul University Cerrahpaşa Medical Faculty
• Ondokuz Mayıs University
• Zeynep Kamil Childrens Hospital
• Kocaeli University Medical Faculty
• UT Southwestern Medical Center Pediatric Urology, Dallas, USA
• Ege University Medical Center Pediatric Urology
• Yeditepe University

Prof. Dr. Selami Sozubir has authored 65 scientific publications, which have received over 11,000 reads and nearly 1,000 citations, reflecting his strong contribution to the field of pediatric surgery and urology.

Areas of Interests

• Genital Laser Application ( Vajinal  Rejuvenation , Laser Incontinence Treatment)
• Aesthetic  Genital  Surgery ( Labioplastia, Vaginoplastia, Perineoplastia )
• Vaginismus Treatment.
• Treatment Of Female Sexual Function Disorders.
• Hormonal & Non-Hormonal Treatment.
• Laser Incontinence Treatment.
• Medical Treatment İn Incontinence.

Education

• Hacettepe  University  Faculty of  Medicine, ANKARA.
• SBÜ. ANKARA Dr. Zekai Tahir Burak  Training and  Research  Hospital.

Experience

• SBÜ.ANKARA Dr. Zekai Tahir Burak Training and Research Hospital.
• Antalya Training and  Research  Hospital,
• Jinefem , Private Gynecology Center, ANTALYA
• SM Clinic, Private Gynecology Center, ANTALYA
• Liv Hospital Ulus, İSTANBUL

Research:

• Gestational  Diabetic  Evaluation of  Affinity in Pregnant  Woman in Turkey.
• The  Effect of Intrauterin Insemination on  Pregnancy  Rates in Infertile Woman in 456 cycles.
• The  Effect of  Genital  Laser  Applications on  Urinary  Incontinence  Treatment.
• The  Effect of  Genital  Laser  Applications  on  Vaginal  Atrofi  in  Menopause.
• Distribution of Human Papilloma Virus (HPV) İnfection in the Mediterranean Region in Turkey.

Areas of Interests

• General Neurology
• Clinical Neurophysiological examinations (Electromyography, evoked potentials, electroencephalography, polysomnography)
• Peripheral Nervous System Diseases
• Muscle diseases
• Epilepsy
• Headache
• Sleep and sleep disorders
• Migraine botox and botulinum A toxin applications

Education:

• 1980-1985 Atatürk Elementary School
• 1985-1988 Anamur High School
• 1988-1991 Anamur High School
• 1991-1998 Marmara University Faculty of Medicine in English
• 2000- 2004 PTT Education and Research Hospital Neurology Clinic (Medical Specialization Student)
• 2007-2010 Istanbul University Health Sciences Experimental Medicine Research Institute Electroneurophysiology Master's Program
• 2012- Clinical Neurophysiology Sub-branch Specialist

Experiences:

• September 2023-Currently Haliç University Faculty of Medicine, Faculty Member
• January 2023-Currently Hisar Intercontinental Hospital, Department of Neurology
• 2014- August 2023 Bilgi University Health Sciences Vocational School Electroneurophysiology Department, Faculty Member
• 2019- 2022 Ataşehir Private Avicenna Hospital, Neurology Department
• 2009-2018 Fatih Sultan Mehmet Education and Research Hospital Neurophysiology Laboratory (Specialist Doctor)
• 2007-2010 Istanbul University Health Sciences Experimental Medicine Research Institute Electroneurophysiology Master's Program
• 2005-2006 Istanbul University Istanbul Faculty of Medicine Department of Neurology Electrodiagnostics Department EMG Laboratory
• 2000-2004 PTT Education and Research Hospital Neurology Clinic (Specialist Student in Medicine)

Dr. Gökalp Öner is a leading gynaecologist and infertility specialist with over 15 years of experience. He focuses on in vitro fertilization (IVF), reproductive endocrinology, and pregnancy care. Dr. Öner is known for his skills in advanced ovarian stimulation, embryo culture, and genetic testing. His work has helped improve IVF success rates.

He has published research on fresh and frozen-thawed euploid blastocyst transfer protocols. This shows his dedication to evidence-based practice. Dr. Öner is an active member of the Turkish Medical Association, Turkish Society of Obstetrics and Gynaecology, Turkish Society of Reproductive Medicine, and ESHRE. He follows international standards in his practice.

I graduated from Ankara University, Faculty of Medicine, in 1984. After compulsory service, I traveled abroad (UK, Saudi Arabia, Greece and Russia) for a many years to study and work in the fields of gynecology and infertility. In 1997, I received my specialist training from Kartal Training and Research Hospital. Following my training, I worked at Kartal SSK hospital. In 2001, I went to Tel Aviv University in Israel and received training In Vitro Fertilization and reproductive endocrinology. After returning to Turkey, I opened my own in vitro fertilization center ( IVF Center). Following the closure of the hospital in which my IVF center was located due to economic reasons, I started practicing private medicine. A while after that, I started working as the manager of The Gynecological Oncology and IVF Center in Bodrum Acibadem Hospital. Then, I returned to Istanbul, and continued my work in private hospitals as a specialist in gynecological oncology and IVF.
Throughout my long years of experience I did over 15.000 IVF trails.

Dr. Hamdullah Sozen is a gynecologic oncologist with expertise in ovarian, endometrial, and cervical cancers. He is known for his skills in gynecological endoscopic surgery. Dr. Sozen uses minimally invasive techniques that help patients recover faster and improve outcomes.

He is an expert in colposcopy and cervical pathology. He has advanced training in both diagnostic and interventional procedures. Dr. Sozen completed his medical and oncology training at leading Turkish institutions, including Akdeniz University, Zeynep Kamil, and Istanbul Medical Faculty.

He is an active member of international associations such as ESGO and MEMAGO. Dr. Sozen has contributed to women’s cancer care through his clinical work, research, and teaching.

Education

İnönü Üniversitesi Tıp Fakültesi (ingilizce) 1995- 2002

Work Experience

Başbakanlık S.H.Ç.E.K. Genel Müdürlüğü Kurum Hekimliği (2003)

Erciyes Üniversitesi Tıp Fakültesi Genel Cerrahi Uzmanlığı 2011

Yüzüncü Yıl Üniversitesi Temel ve İleri Düzey Endoskopik Girişimler Eğitimi 2011

İstanbul Hastanesi /Van 2011

Özel Malatya Hastanesi / Malatya2012

Bilgi Tıp Merkezi Keçiören /Ankara 2013

Özel Koru Sincan Hastanesi Sincan/Ankara 2013

Baş Tibb Mərkəzi /Baku Clinic Azerbaycan/Bakü 2013

Yüksek İhtisas Üniversitesi Özel Koru Ankara Hastanesi 2019

Özel Ankara Koru Hastanesi /Ankara 2019

Medical Interests

laparoscopic obesity
Laparoscopic abdominal and inguinal hernia repairs (with the latest techniques)

Postpartum laparascopic diastasis recti (the formation of a protrusion in the upper middle abdomen due to the separation of the muscles in the abdominal tissue) and abdominal hernias above the navel and and gobekustunde both diastasis recti repair and abdominal hernia repair from the skin with laparascopic scola method for the first time in Turkey laparascopic stomach hernia and antireflu surgery).  

Laparoscopic gallbladder surgeries, including cleaning the bile duct with trans-cystic choledochal irrigation in patients with bile sludge and stones less than 5mm in the bile duct, performed in the same session

Laparoscopic gallbladder surgeries in pregnant women during the 2nd and 3rd trimesters, i.e., after 12 weeks of pregnancy

Laparoscopic Appendectomy in Pregnancy

Anal disorders, anal fissures, all types of internal and external hemorrhoid surgeries, anal fissure, and anal fistula surgeries

Thyroid surgeries and cancers, parathyroid surgeries and cancers

Breast diseases and breast cancer surgery

Oncological surgery; liver and gallbladder and bile duct surgeries, stomach cancer surgery, colon cancer surgery, and liver resections for metastatic liver tumors