Page 4 - Best Comprehensive diagnosis of Сolorectal Pathology doctors: TOP 74 doctors

Doctor Brenda Pastrana is a mexican surgical Oncologist. 

Medical background.

Centro Medico Nacional 20 de Noviembre Issste, Surgical Oncologist in 2020.

Title by Universidad Autónoma de México UNAM.

Surgical Residency Instituto Mexicano del Seguro Social. 2015.

Title by Universidad de Quintana Roo. 

Board Certified by Conacem from 2020 to 2025 number 2171 

Board Certified by Conacem from 2025 to 2030 number 2171

Member of SMEO. Sociedad Mexicana de Oncología. 

University teacher at Universidad Anahuac of Medicine since 2020.

Dr. Boris Pekárek is a gastroenterologist. He graduated from the Faculty of Medicine, Comenius University in Bratislava in 2002. He worked at the Internal Medicine Clinic in Trnava from 2002 to April 2010. He obtained his specialization in gastroenterology in 2008.

Since April 2010, he has worked at the Gastroenterology Department of the National Cancer Institute. He has led the department since 2017. He completed several specialized training courses abroad. He focuses on endoscopic diagnosis and treatment of early tumors of the esophagus, stomach, colon, and rectum.

He served as chair of the Oncology Section of the Slovak Gastroenterological Society from 2018 to 2024. He is the current chair of its Endoscopy Section and a member of the Society’s committee. He publishes, lectures at conferences, and trains basic and advanced endoscopic techniques in Slovakia and abroad.

Dr. Daniela Osuská is a gastroenterologist. She graduated from the First Faculty of Medicine, Charles University, in 2010. From 2010 to 2019 she worked as a secondary physician at the Internal Medicine Clinic of Nitra University Hospital. There she began performing endoscopies. Since 2019 she has worked at the Gastroenterology Department of the National Cancer Institute. She earned her gastroenterology specialization in 2021.

She serves on the supervisory board of the Oncology Section of the Slovak Gastroenterological Society and the Section of Young Gastroenterologists. She publishes and presents her work in Slovakia and abroad. She also trains physicians in endoscopic techniques.

Dr. Juraj Letkovsky has been a gastroenterologist at the Gastroenterology Department of the National Cancer Institute (NOÚ) since 2017. He graduated in medicine in 2012 and earned a PhD in internal medicine in 2016. He obtained specialization in gastroenterology in 2018.

His practice focuses on advanced endoscopic diagnosis and treatment of digestive tract tumors. He performs endosonography and ERCP for pancreatic and biliary diseases.

He serves on the Young Gastroenterologists, Endoscopy, and Oncology sections of the Slovak Gastroenterology Society. He is a co-author of an ongoing multicenter study on colonoscopy quality in Slovakia. He holds certificates in diagnostic and interventional esophagogastroduodenoscopy (2022) and endoscopic retrograde cholangiopancreatography (2023).

Dr. Andrej Orságh is a gastroenterologist, certified in 2015. He has worked at the Gastroenterology Department of the National Cancer Institute (NOÚ) since 2016. Since 2019 he has been the institute’s specialist consultant for colorectal cancer screening. He leads the colorectal cancer screening working group of the Slovak Gastroenterological Society. He is vice-chair of its Endoscopy Section and chair of its Oncology Section.

He graduated from Comenius University in 2009. He trained at the Gastroenterology Clinic of the University Hospital in Bratislava and at the Slovak Medical University. He shares his expertise at professional conferences and in publications. He also teaches basic and advanced endoscopic techniques in NOÚ courses.

Assoc. Prof. Atakan Topçu, M.D., is a medical oncologist at Medipol University and Medipol Acıbadem Regional Hospital. He treats solid tumors, including lung, breast, colorectal, gastric, and neuroendocrine cancers. His work also covers targeted therapies, immunotherapy, geriatric oncology, and cancer-related malnutrition, cachexia, and sarcopenia.

He has authored more than 50 peer-reviewed papers. Recent work includes a 2024 Frontiers in Medicine study on geriatric syndromes and a 2023 Future Oncology paper on sarcopenia and anxiety in lung cancer. He has also published on the CONUT score in breast cancer and on malnutrition in HER2-negative metastatic gastric cancer.

Dr. Topçu serves on the Editorial Board of BMC Cancer. He is a member of the Turkish Society of Medical Oncology, ESMO, and the Turkish Geriatrics Society. Education and training: M.D., Uludağ University; residency in Internal Medicine, Marmara University; fellowship in Medical Oncology, Bezmialem Vakıf University.

Director of the Department of Gastroenterology

[Areas of Expertise]
Gastrointestinal diseases; upper gastrointestinal endoscopy and colonoscopy; polypectomy; ESD (Endoscopic Submucosal Dissection); digestive disorders; gastric cancer; esophageal cancer; Helicobacter pylori infection; liver diseases; inflammatory bowel disease (Crohn’s disease, ulcerative colitis); small-bowel capsule endoscopy.

Professional Background

Graduated from Kyung Hee University College of Medicine

Completed internship at Kyung Hee Medical Center

Completed internal medicine residency at Hallym University Sacred Heart Hospital

Clinical Instructor, Division of Gastroenterology, Chung-Ang University Hospital

Full Member, Korean Association of Internal Medicine

Life member of Korean Society of Gastrointestinal Endoscopy

Board-Certified Subspecialist in Gastrointestinal Endoscopy

Medical Advisor for KBS, MBC, SBS, JTBC, and MBN

Current Position

Director, Department of Gastroenterology, Naeun Hospital