Seyithan Özaydın

İSÜ Liv Hospital Bahçeşehir

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Areas of Interests

Neonatal surgery
Thyroid and endocrine surgery
Oncology surgery
Uro-genital surgery
Intra-abdominal, intestinal and anorectal definitive-reconstructive surgery
Bronchoscopic, endoscopic, cystoscopic, thoracoscopic, laparoscopic procedures

Education:

Ankara High School
Firat University Faculty of Medicine

Specialty Training:

Ankara Dr. Sami Ulus Child Health and Diseases Hospital Pediatric Surgery

Experience:

Bağcılar Training and Research Hospital
Üsküdar State Hospital
Kanuni Sultan Süleyman Training and Research Hospital
Pine and Sakura City Hospital
Cerrahpasa Faculty of Medicine Pediatric Surgery
Bangladesh Turkish Field Hospital

A. Internationally Refereed Journals:

A1. Süleyman Çelebi, Serdar Sander, Özgür Kuzdan, Seyithan Özaydın, Ünal Güvenç, Sevgi Yavuz, Aysel Kıyak, Oyhan Demirali Misdiagnoses caused by use of indwelling urethral catheters in children with ureterovesical junction anomalies, Int Urol Nephrol 2015 Apr;47(4): 579-583.
A2. Süleyman Çelebi, Özgür Kuzdan, Serdar Sander, Nermin Gündüz, Seyithan Özaydın, Sevgi Yavuz Congenital Prepubic Sinus with Remnant tissue Mimics Corpus Spongiosum: A rare Case, Eur J Pediatr Surg Rep 2015 Jun;3(1):43-45.
A3. Süleyman Çelebi, Serdar Sander, Özgür Kuzdan, Seyithan Özaydın, Cemile Beşik Beştaş, Sevgi Yavuz, Aysel Kıyak, Oyhan Demirali, Current diagnosis and management of primary isolated bladder diverticula in children, J Pediatr Urol 2015 Apr;11(2):61.e1-5.
A4. Süleyman Çelebi, Özgür Kuzdan, Seyithan Özaydın, Cemile Başdaş, İpek Özaydın, Mehmet Yazıcı, Serdar Sander, The effect of bladder diverticula on bladder function: An experimental study in rabbits, J Pediatr Surg 2016 Sep; 51(9):1538-1542.
A5. Süleyman Çelebi, Seyithan Özaydın, Cemile Beşik Başdaş, Özgür Kuzdan, Cankat Erdoğan, Mehmet Yazıcı, İsmail Caymaz, Serdar Sander, Reliability of the Grading System for Voiding Cystourethrograms in the Management of Vesicoureteral Reflux: An Interrater Comparison, Advances in Urology.2016:1684190. doi: 10.1155/2016/1684190. Epub 2016 Mar 16.
A6. Süleyman Çelebi, Özgür Kuzdan, Seyithan Özaydın, Cemile Beşik Başdaş, İpek Özaydın, Cankat Erdoğan, Serdar Sander, A bladder diverticulum model in rabbits, J Pediatr Urol 2016 Oct; 12(5):311.e1-311.e6. doi: 10.1016/j.jpurol.2016.03.010.
A7. Melike Korkmaz Toker, Yasemin Altan, Fatih Ciftci, Aykan Gulleroglu, Seyithan Ozaydin, Yavuz Demiraran, A comparison of pre-emptive regional analgesic modalities for unilateral inguinal hernia repair in children, Int J Clin Exp Med 2016;9(6):11244-11251.
A8. Seyithan Ozaydin, Suleyman Celebi, Ismail Caymaz, Cemile Besik, Birgul Karaaslan, Ozgur Kuzdan and Serdar Sander Increasing the Reliability of the Grading System for Voiding Cystourethrograms Using Ultrasonography: An Inter-Rater Comparison, Nephro-Urology Monthly 2016 Jul 31;8(5):e38685. doi: 10.5812/numonthly.38685
A9. Cemile Beşik, Süleyman Çelebi, Seyithan Özaydın, Birgül Karaaslan, Reyhan Alim, Ünal Güvenç, Serdar Sander, Unusual presentation of duplex kidneys: ureteropelvic junction obstruction, Advances in Urology.2016: Article ID 7960794, 6 pages dx.doi.org/10.1155/2016.
A10. Süleyman Çelebi, Başak Erginel, Seyithan Özaydın, Cemile Başdaş, Esra Polat, Serdar Sander, Hyperacidity in Meckel’s Diverticulum: A Hypothesis, Med Sci Hypotheses 2017;4:24-28.
A11. Seyithan Ozaydin, Aykan Gulleroglu, Birgul Karaaslan, Suleyman Celebi, Cemile Besik, Melike Korkmaz Toker, Serdar Sander, Penetrating injury caused by a long contruction iron: a case report, North Clin Istanb 2018;5(1):75-78.
A12. Suleyman Celebi, Seyithan Ozaydin, Esra Polat, Birgul, Karaaslan, Cemile Basdas, Elmas Reyhan Alim, Serdar Sander, Vitelline duct pathologies in neonates, Northern Clinics of Istanbul 2018;5(3):211-215.
A13. Aslan Babayigit, Seyithan Ozaydin, Merih Cetinkaya, Serdar Sander, Neonatal gastric perforations in very low birth weight infants: a single center experience and review of the literature, Pediatr Surg Int 2018;34(1):79-84.
A14. MÖ Kuzdan, R Alim, B Karaaslan, S Çelebi, Seyithan Özaydın, The effect of technical problems on the operation process in pediatric laparoscopy, Med Bull Sisli Etfal Hosp 2019;53(2):110-113.
A15. MÖ Kuzdan, A Alim, R Alim, S Çelebi, Seyithan Özaydın, B Karaaslan, C Beşik, Diant infantile hepatic hemangioma: Case report and surgical technique, Giant infantile liver hemangioma: Case report and surgical technique, Med Bull Sisli Etfal Hosp 2020;54(1):108-112.
A16. Burcu Cebeci, Aslan Babayigit, Seyithan Ozaydin, Gokhan Buyukkale, Merih Cetinkaya, Congenital esophageal diverticulum in a very low birth weight infant: case report and review of the literature, The Turkish Journal of Pediatrics 2020;62(3):520-524.
A17. Merih Cetinkaya, Tugba Erener Ercan, Sevgi Yavuz, Seyithan Ozaydin, Peritoneal dialysis as a life-saving procedure in an extremely low birth weight infant: case report and review of the literature, The Turkish Journal of Pediatrics 2020;62(6):1069-1076.
A18. Aygün D, Yıldırım T, Başoğlu Öner Ö, Kuzdan Ö, Özaydın S, Erbaş M, Şiraneci R, Hydatid disease in childhood: A single center experience, J Pediatr Inf 2020;14(2):80-86.
A19. Mustafa Behram, Süleyman Cemil Oğlak, Seyithan Özaydin, Sema Süzen Çaypinar, İlker Gönenç, Şeyhmus Tunç, Yusuf Başkiran, İsmail Özdemir, What is the main factor in predicting the morbidity and mortality in patients with Gastroschisis: Delivery time, delivery mode, closure method, or the type of Gastroschisis (simple or complex)? Turk J Med Sci. 2021 Jun 28;51(3):1587-1595. doi: 10.3906/sag-2011-166.
A20. S Ozaydin, S Celebi, Ureteropelvic junction obstructions: Is it a prognostic factor? Niger J Clin Pract. 2022 Aug;25(8):1357-1360.
A21. Comert HSY, Güney D, Durakbaşa ÇU, Dokumcu Z, Soyer T, Firinci B, Ciftci İ, Oztan MO, Demirel BD, Parlak A, Gollu G, Karaman A, Akkoyun İ, Gul C, Ilhan H, Oral A, Ozcan R, Ozen O, Kiyan G, Erdem AO, Ozaydin S, Uzunlu O, Yildiz A, Erginel B, Erturk N, Bilici S, Samsum H, Ozen MA, Ozcakir E, Aydin E, Mert M, Topbas M. The effect of postoperative ventilation strategies on postoperative complications and outcomes in patients with esophageal atresia: Results from the Turkish Esophageal Atresia Registry. Pediatr Pulmonol. 2023 Mar;58(3):763-771. doi: 10.1002/ppul.26251. Epub 2022 Nov 25.PMID: 36398363
A22. Oztorun CI, Ulukaya Durakbasa C, Soyer T, Ozcan C, Firinci B, Demirel BD, Ciftci I, Parlak A, Oztan MO, Gollu Bahadir G, Akkoyun I, Karaman A, Gul C, Salci G, Ilhan H, Oral A, Ozcan R, Ozaydin S, Kilic SS, Kiyan G, Erdem AO, Uzunlu O, Yildiz A, Ozcakir E, Erturk N, Erginel B, Oztas T, Atic A, Mert M, Samsum H, Ozen MA, Aydin E, Sancar S. Determining the Risk Factors for Anastomotic Stricture Development after Esophageal Atresia Repair: Results from the Turkish Esophageal Atresia Registry. Eur J Pediatr Surg 2024; 34(06): 550-557 DOI: 10.1055/a-2340-9078
A23. Seyithan Özaydın, Combined Treatment of Tunnelled Composite Anterior-Lateral Inguinal Skin Flap, Buccal Mucosal Graft and Hyperbaric Oxygen Therapy for Catastrophically Lost Penis after Circumcision, Arch. Esp. Urol. 2024;77(7):826–836. https://doi.org/10.56434/j.arch.esp.urol.20247707.115
A24. Seyithan Ozaydin, Sumeyra Dogan, Ipek Yildiz Ozaydin, Ali Aycicek, Rabia Ata, Zahit Mahmut, Unal Guvenc, Cemile Besik, Oyhan Demirali, Colorectal cancer in children: an evaluation of the existing literature based on the 11‐year experience of a single center, Pediatric Surgery International (2025) 41:116 https://doi.org/10.1007/s00383-025-06020-y

B. National Refereed Journals:

B1. Seyithan Ozaydin, Ayse Karaman, Y. Hakan Cavusoglu, Ibrahim Karaman, Derya Erdogan, MK Aslan, Ozden Cakmak, Foley Catheter Method in Removing Coins in the Upper Esophagus, Turkish Clinics Journal of Pediatrics 2005;14(4):175-177.
B2. Seyithan Ozaydin, Ayse Karaman, Ibrahim Karaman, Derya Erdogan, Yusuf Hakan Cavusoglu, MK Aslan, Ozden Cakmak, Adrenal Abscess: Case Report, Journal of Pediatric Surgery 2007;21(3):144-146.
B3. Meltem Erol, Ozgul Yigit, Mehmet Toksoz, Ozlem Bostan Gayret, Seyithan Ozaydin, Fatih Akova, Emine Kutanis, Evaluation of Our Cyst Hydatid Cases Presenting Pulmonary Symptoms, Haseki Medical Bulletin 2015;53:147-152.
B4. Melike Korkmaz Toker, Aykan Gulleroglu, Aysegul Karabay, Hasan Huseyin Kilic, Seyithan Ozaydin, Yavuz Demiraran, Anesthetic Management of Patients with Esophageal Atresia, Istanbul Kanuni Sultan Suleyman Medical Journal 2015;7(3):111-115.
B5. Seyithan Ozaydin, Zahit Mahmut, Suleyman Celebi, Cemile Besik Basdas, Unal Guvenc, Serdar Sander, Inguinal Hernia and Hydrocele in Children: Twenty-Seven Years of Experience, Istanbul Kanuni Sultan Suleyman Medical Journal 2016;8(1):41-44.
B6. Süleyman Çelebi, Seyithan Özaydın, Cemile Beşik Başdaş, İpek Yıldız Özaydın, Ünal Güvenç, Özgür Kuzdan, Serdar Sander, Incomplete Bladder Duplication Accompanying Complete Hindgut Duplication: A Rare Case, Istanbul Kanuni Sultan Süleyman Medical Journal 2016;8(1):41-44.
B7. Seyithan Özaydın, Meltem Erol, Süleyman Çelebi, Cemile Başdaş, Ünal Güvenç, Birgül Karaaslan, Serdar Sander, Gastrointestinal Surgical Problems Caused by Swallowed Foreign Bodies, Istanbul Kanuni Sultan Süleyman Medical Journal 2016;8(2):106-110.
B8. Seyithan Ozaydin, Cemile Besik, Unal Guvenc, Ipek Ozaydin, Suleyman Celebi, Serdar Sander, Our initial experiences in transanal endorectal pull-through surgery in the treatment of Hirschsprung's disease, Pediatric Surgery Journal 2016;30(1):9-13.
B9. Bahattin Aydoğdu, Mehmet Ozgur Kuzdan, Suleyman Celebi, Seyithan Ozaydin, Serdar Sander, Children's dangerous toy: an injury case with an air gun, Istanbul Kanuni Sultan Suleyman Medical Journal 2016;8(3):174-177.
B10. Seyithan Ozaydin, Serdar Sander, Cemile Besik, Unal Guvenc, Aslan Babayigit, Esra Polat, Ipek Y. Ozaydin, Merih Cetinkaya, Lengthening of the intestine with Bianchi method in short bowel syndrome: Two case reports and approaches of pediatric surgeons in Turkey, Pediatric Surgery Journal 2016;30(3):137-143.
B11. Suleyman Celebi, Seyithan Ozaydin, Cemile Besik, Birgul Karaaslan, Unal Guvenc, Elmas Reyhan Alim, Serdar Sander, Meckel Diverticulum in childhood: Thirty years of experience, Pediatric Surgery Journal 2016;30(3):128-132.
B12. Seyithan Ozaydin, Yusuf Hakan Cavusoglu, Acute Scrotum, Istanbul Kanuni Sultan Suleyman Medical Journal 2019;11(2):102-109.
B13. Seyithan Ozaydin, Senol Emre, Mehmet Ozgur Kuzdan, Cemile Besik, Rahsan Ozcan, Gonca Topuzlu Tekant, Surgical treatment results in adolescent gynecomastia, Pediatric Surgery Journal 2021;35(3):95-102.
B14. Seyithan Ozaydin, Cemile Besik, A rare case series: 32 years of congenital lumbar hernia experience of a single center, Istanbul Kanuni Sultan Suleyman Medical Journal, 2021;13(3):222-226.
B15. Seyithan Ozaydin, Birgul Karaaslan, Wilms Tumor: Review of current literature with 32 years of experience of a single center, Istanbul Kanuni Sultan Suleyman Medical Journal, 2021;13(3):207-212.
B16. Aytaç Kaplan EH, Kocabey Sütçü Z, Özaydın S, Önal H. Evaluation of the Adrenal Region in Childhood: A Single Center Experience, Akd Medical Journal 2024;10(2):323-327.

C. Oral Presentations at International Congresses:

C1. Sahin A, Ozaydin S, Ozkan S, Horata E, Yildiz N, Salihoglu Z, Iatrogenic injury and intensive care follow-up after foreign body removal from esophagus in a child patient, The European Anesthesiology Congress 30 May-01 June 2020 Barcelona, Spain. European Journal of Anaesthesiology (EJA) Vol 37 (e-Suplplement 58) June 2020.
C2. Seyithan Özaydın, Negative exploration: Thirty-three-year results of a single center, 6th International Congress of Medical and Health Sciences Research (UTSAK), 10–11 April 2021 -Online- Ankara, Turkey.
C3. Seyithan Ozaydin, Oyhan Demirali, Our bronchoscopy and esophagoscopy experiences, 7th International Congress of Medical and Health Sciences Research (UTSAK), August 28-29, 2021 -Online- Ankara, Turkey.
C4. MÖ Kuzdan, C Beşik, Seyithan Ozaydin, B Karaaslan, Laparoscopy in obese children: Umbilical closure with PIRS method, 36th National Congress of Pediatric Surgery-3rd International Congress of Pediatric Endoscopy Surgery Group-Middle East Section; October 24-27, 2018 Izmir.

D. Oral Presentation in National Congresses

D1. M Kemal Aslan, İbrahim Karaman, Ayşe Karaman, Derya Erdoğan, Y Hakan Çavuşoğlu, Seyithan Ozaydin, Özden Çakmak, Our Transanal Endorectal Pull-Throuhg Experiences in Hirschsprung Disease, 24th National Congress of Pediatric Surgery; 05-08 November 2006, Adana.
D2. Aslan Babayiğit, Seda Yılmaz Semerci, Burcu Cebeci, Seyithan Özaydın, Dilek Kurnaz, Gökhan Büyükkale, Ebru Kazancı, Serdar Sander, Merih Çetinkaya, Evaluation of Our Cases with Surgical Necrotizing Enterocolitis and Spontaneous Intestinal Perforation, 24th National Neonatology Congress; 17-20 April 2016, Antalya.
D3. Seyithan Özaydın, Cemile Beşik, Ünal Güvenç, Birgül Karaaslan, Reyhan Alim, Serdar Sander, Repair of traumatic ureteral defect with appendix vermiformis: Case report, 35th National Pediatric Surgery Congress; 25-28 October 2017, Edirne.
D4. MÖ Kuzdan, C Beşik, S Çelebi, Seyithan Özaydın, R Alim, B Karaaslan, O Demirali, Z Mahmut, Ü Güvenç, S Sander, Technical problems in ureterorenoscopy attempts in children, 9th National Pediatric Urology Congress, 3-6 May 2018, Adana.

E. Poster Presented in National Congresses:

E1. Ozlem Bostan Gayret, Ozgul Yigit, Ozlem Basoglu Oner, Meltem Erol, Ebru Tok Demirgan, Seyithan Ozaydin, Congenital Diaphragmatic Hernia Case 47th Turkish Pediatric Congress; May 10-14, 2011, Turkish Republic of Northern Cyprus.
E2. Nur Eray, Seyithan Ozaydin, Fatih Akova, Hypospadias Experiences of a Newly Established Pediatric Surgery Clinic 3rd National Pediatric Urology Congress; April 05-07, 2012, Bursa.
E3. Burcu Cebeci, Aslan Babayigit, Seda Yilmaz Semerci, Seyithan Ozaydin, Cemile Besikci, Gokhan Buyukkale, Serdar Sander, Merih Cetinkaya, Meconium Ileus In Utero Intestinal Perforation and Non-Immune Hydrops Fetalis Case Report; 23rd National Neonatology Congress; April 19-22, 2015, Adana.
E4. Seda Yılmaz Semerci, Ünal Güvenç, Aslan Babayiğit, Seyithan Özaydın, Burcu Cebeci, Ayşe Tuzlacı, Gökhan Büyükkale, İpek Özaydın, Serdar Sander, Merih Çetinkaya, Giant Sacrococcygeal Teratoma in the Neonatal Period: A Case Report; 23rd National Neonatology Congress; April 19-22, 2015, Adana.
E5. Seyithan Özaydın, Ferhan Akıcı, Süleyman Çelebi, Birgül Karaaslan, Cemile Beşik Başdaş, Cankat Erdoğan, Ünal Güvenç, Zahit Mahmut, Oyhan Demirali, Serdar Sander, Recurrence After Ten Years: A Case of Wilms Tumor; 1st Uludağ Pediatric Surgery Winter Symposium March 13-15, 2016, Bursa. E6. Seyithan Ozaydin, Suleyman Celebi, Burcu Cebeci, Aslan Babayigit, Seda Yilmaz Semerci, Cemile Besik Basdas, Birgul Karaaslan, Cankat Erdogan, Unal Guvenc, Gokhan Buyukkale, Merih Cetinkaya, Serdar Sander, Interesting Causes of Empyema: Three Case Reports; 1st Uludag Pediatric Surgery Winter Symposium, 13-15 March 2016, Bursa.
E7. Cankat Erdogan, Seda Yilmaz Semerci, Seyithan Ozaydin, Suleyman Celebi, Burcu Cebeci, Aslan Babayigit, Cemile Besik Basdas, Birgul Karaaslan, Gokhan Buyukkale, Merih Cetinkaya, Serdar Sander, Octreotide Treatment in Congenital Chylothorax: Case Report; 1st Uludag Pediatric Surgery Winter Symposium, 13-15 March 2016, Bursa.
E8. Aslan Babayigit, Burcu Cebeci, Seda Yilmaz Semerci, Seyithan Ozaydin, Dilek Kurnaz, Gokhan Buyukkale, Ebru Kazanci, Serdar Sander, Merih Cetinkaya, Neonatal Period Outcomes of Our Patients Diagnosed with Congenital Diaphragmatic Hernia: Three-Year Experience, 24th National Neonatology Congress; April 17-20, 2016, Antalya.
E9. Burcu Cebeci, Dilek Kurnaz, Seda Yilmaz Semerci, Aslan Babayigit, Seyithan Ozaydin, Gokhan Buyukkale, Ebru Kazanci, Merih Cetinkaya, Esophageal Perforation in a Neonate with Arthrogryposis Multiplex Congenita: Case Report, 24th National Neonatology Congress; April 17-20, 2016, Antalya.
E10. Burcu Cebeci, Aslan Babayigit, Dilek Kurnaz, Seda Yilmaz Semerci, Seyithan Ozaydin, Gonca Vardar, Gokhan Buyukkale, Ebru Kazanci, Merih Cetinkaya, Megacystis-Microcolon-Intestinal Hypoperistalsis Syndrome in a Very Low Birth Weight Premature Infant: Case Report, 24th National Neonatology Congress; April 17-20, 2016, Antalya.
E11. Aslan Babayigit, Dilek Kurnaz, Seda Yilmaz Semerci, Burcu Cebeci, Esra Ozpinar, Seyithan Ozaydin, Ebru Kazanci, Gokhan Buyukkale, Murat Sahin, Merih Cetinkaya, A Neonate with Tetralogy of Fallot and Spina Bifida Occulta Accompanying Congenital Diaphragmatic Hernia: Jarcho Levin Syndrome? 24th National Neonatology Congress; April 17-20, 2016, Antalya.
E12. M Yazıcı, Ö Kuzdan, S Çelebi, Seyithan Özaydın, S Sander, A rare complication of a congenital anomaly: Axial Torsion of Meckel's Diverticulum, 34th National Congress of Pediatric Surgery and Pediatric Urology; October 26-30, 2016, Kyrenia, TRNC.
E13. B Karaaslan, C Beşik, Seyithan Özaydın, S Çelebi, Ü Güvenç, R Alim, İ Özaydın, S Sander, Approach to ovarian problems in children, 34th National Congress of Pediatric Surgery and Pediatric Urology; October 26-30, 2016, Kyrenia, TRNC.
E14. Esra Polat, Abdüsselam Genç, Hatice Baba, Seyithan Özaydın, Günsel Kutluk, Testicular Involvement in Peutz Jeghers Syndrome: A Case Report, 33rd Gastroenterology Week, November 22-27, 2016 Antalya.
E15. Merih Çetinkaya, Şahin Kalkan, Özge Sağlam, Dilek Kurnaz, Seda Yılmaz Semerci, Burcu Cebeci, Seyithan Özaydın, Gökhan Büyükkale, Ebru Kazancı, Premature Infants Developing Necrotizing Enterocolitis from Feeding: Who is at Risk? 25th National Neonatology Congress; April 12-16, 2017, Antalya.
E16. Ozge Saglam, Seda Yilmaz Semerci, Dilek Kurnaz, Tugbanur Tahtakesen, Ezgi Pasli Uysalol, Seyithan Ozaydin, Gokhan Buyukkale, Ebru Kazanci, Merih Cetinkaya, A rare complication of congenital leukemia: Neutropenic Enterocolitis (typhlitis), 25th National Neonatology Congress; April 12-16, 2017, Antalya.
E17. Dilek Kurnaz, Seda Yilmaz Semerci, Burcu Cebeci, Ozge Saglam, Aslan Babayigit, Gokhan Buyukkale, Ebru Kazanci, Seyithan Ozaydin, Aysel Kiyak, Merih Cetinkaya, Peritoneal dialysis as a rescue treatment in extremely low birth weight premature infants, 25th National Neonatology Congress; April 12-16, 2017, Antalya.
E19. Dilek Kurnaz, Alper Gezdirici, Seda Yılmaz Semerci, Ebru Kazancı, Burcu Cebeci, Demet Deniz Doğancı, Seyithan Özaydın, Gökhan Büyükkale, Merih Çetinkaya, Casamassima-Morton-Nance Syndrome, rarely seen in newborns: two case reports, 25th National Neonatology Congress; April 12-16, 2017, Antalya.
F20. Burcu Cebeci, Seyithan Özaydın, Şahin Kalkan, Seda Yılmaz Semerci, Özge Sağlam, Dilek Kurnaz, Ebru Kazancı, Gökhan Büyükkale, Serdar Sander, Merih Çetinkaya, A rare cause of antenatal ascites: Intrauterine ileocecal perforation, 25th National Neonatology Congress; April 12-16, 2017, Antalya.
E21. Burcu Cebeci, Dilek Kurnaz, Ozge Saglam, Seda Yilmaz Semerci, Ebru Kazanci, Ali Aycicek, Aydin Tekgoz, Emine Ayla Gokce, Seyithan Ozaydin, Gokhan Buyukkale, Merih Cetinkaya Candida parapsilosis-associated thrombosis in a case with gastochisis, 25th National Neonatology Congress; April 12-16, 2017, Antalya.
E22. Kazim Okan Dolu, Melek Yildiz, Seyithan Ozaydin, Ezgi Bayrakdaroglu, Ibrahim Mert Erbas, Banu Aydin, Hasan Onal A rare cause of bilateral undescended testes: Anti-mullerian hormone deficiency, 53rd Turkish Pediatrics Congress; May 14-18, 2017, Kyrenia.
E23. Seyithan Ozaydin, Cemile Besik, Melek Yildiz, Unal Guvenc, Birgul Karaaslan, Reyhan Alim, Serdar Sander, Ventral reduction mammoplasty in bilateral giant gynecomastia: Case report, 35th National Congress of Pediatric Surgery; October 25-28, 2017 Edirne.
E24. Seyithan Ozaydin, Cemile Besik, Unal Guvenc, Dilek Kurnaz, Ozge Saglam, Reyhan Alim Birgul Karaaslan, Merih Cetinkaya, Serdar Sander, Intraabdominal free air in newborns: Is surgery always necessary? 35th National Congress of Pediatric Surgery; October 25-28, 2017 Edirne.
E25. Esra Ozpinar, Sevgi Yavuz, Aysel Kiyak, MH Serdar Sander, Seyithan Ozaydin, A Case of Nutcracker Syndrome with Epidermolysis Bullosa; 6th Children's Friends Congress, March 8-10, 2018, Istanbul.
E26. Merve Kömürcü, Özge Sağlam, İlker Gönen, Seyithan Özaydın, Merih Çetinkaya, Candida pelliculosa as a rare cause of sepsis in newborns with short bowel syndrome; 6th Children's Friends Congress, March 8-10, 2018, Istanbul.
E27. İbrahim Mert Erbaş, Seyithan Özaydın, Merih Çetinkaya Recurrent gastric perforation after oral ibuprofen administration in a premature baby: a case report, 26th National Neonatology Congress, April 14-18, 2018, TRNC.
E28. Özge Sağlam, Seyithan Özaydın, Gökhan Büyükkale, İpek Özaydın, Merih Çetinkaya A rare cause of acute abdomen developing on the first day of life: Intrauterine Meckel Diverticulum perforation, 26th National Neonatology Congress, April 14-18, 2018, TRNC.
E29. Aslan Babayiğit, İlker Gönen, Beril Yaşa, Özge Sağlam, Emre Dinçer, Seyithan Özaydın, Merih Çetinkaya, Atypical course of isolated ileal atresia in a very low birth weight premature infant: case report, 27th National Neonatology Congress, April 3-7, 2019, Antalya.
E30. Beril Yaşa, İlker Gönen, Emre Dinçer, Özge Sağlam, Seyithan Özaydın, Merih Çetinkaya, Early diagnosis of gastric outlet obstruction in an extremely low birth weight premature infant, 27th National Neonatology Congress, 3-7 April 2019, Antalya.

F. Courses, Trainings, Congress session chairmanship:

F1. 2020-2021 Academic Year 1st and 2nd Semester Çam and Sakura City Hospital Pediatric Surgery Clinic Assistant Dr. Courses
F2. 2021-2022 Academic Year 1st and 2nd Semester Çam and Sakura City Hospital Pediatric Surgery Clinic Assistant Dr. Courses
F3. 2022-2023 Academic Year 1st and 2nd Semester Kanuni Sultan Süleyman EAH Child Health and Diseases Clinic Assistant Dr. Courses
F4. 2023-2024 Academic Year 1st and 2nd Semester Kanuni Sultan Süleyman EAH Child Health and Diseases Clinic Assistant Dr. Courses
F5. 2024-2025 Academic Year 1st and 2nd Semester Kanuni Sultan Süleyman EAH Child Health and Diseases Clinic Assistant Dr. Courses
F6. 2024-2025 Academic Year 1st and 2nd Term Kanuni Sultan Süleyman EAH Urology Clinic Assistant Dr. Courses
F7. Course description in Pediatric Intensive Care Nursing Certified Education Program, Kanuni Sultan Süleyman EAH 2019.
F8. Course description in Pediatric Intensive Care Nursing Certified Education Program, Başakşehir Çam and Sakura City Hospital, 12.04.2021-25.05.2021.
F9. Course description in Pediatric Intensive Care Nursing Certified Education Program, Başakşehir Çam and Sakura City Hospital, 28.06.2021-09.08.2021.
F10. Course description in Pediatric Emergency Service Nursing Certified Education Program, Başakşehir Çam and Sakura City Hospital, 11.10.2021-17.11.2021.
F11. Pediatric Intensive Care Nursing Certificate Education Program lecture, Başakşehir Çam and Sakura City Hospital, 10/25/2021-11/30/2021.
F12. Pediatric Intensive Care Nursing Certificate Education Program lecture, Başakşehir Çam and Sakura City Hospital, 2022.
F13. Pediatric Emergency Service Nursing Certificate Education Program lecture, Başakşehir Çam and Sakura City Hospital, 2023.
F14. Pediatric Emergency Service Nursing Certificate Education Program lecture, Bağcılar EAH, 10/09/2023-11/10/2023.
F15. Pediatric Emergency Service Nursing Certificate Education Program lecture, Bağcılar EAH, 11/09/2023-11/2023.
F16. Course presentation in Pediatric Intensive Care Nursing Certified Education Program, Kanuni Sultan Süleyman EAH, 10/23/2023-11/24/2023.
F17. Course presentation in Pediatric Intensive Care Nursing Certified Education Program, Kanuni Sultan Süleyman EAH, 02/19/2024-02/29/2024.
F18. Hepatobiliary and Upper GIS Session Chair, 40th National Pediatric Surgery Congress; 26-29 October 2023, Ankara.
F19. Course presentation in Pediatric Intensive Care Nursing Certified Education Program, Kanuni Sultan Süleyman EAH, 09/23/2024-10/04/2024.

G. Courses:

G1. The Training Course on Promoting Rational Drug Use; Ministry of Health Rational Drug Use Dissemination Trainer Training Course, 13-24 November 2000, Ankara.
G2. Burn, First Aid and Treatment Course, Ankara Surgical Association; 8 March 2003, Ankara.
G3. Neonatal Resuscitation Program Practitioner Course; Dr Sami Ulus Child Health and Diseases Hospital, 17-19 October 2005, Ankara.
G4. Turkish Pediatric Urology Association Postgraduate Education Activities; Varicocele and Undescended Testis Course, GATA, 24 November 2006, Ankara.
G5. Laboratory Animal Use Certificate Training Course, Bağcılar Education and Research Hospital, 03-14 April 2017, İstanbul.
G6. Diagnostic Approach to Bladder Dysfunction in Children Treatment Course, Koç University Hospital, December 22-23, 2017, Istanbul.
G7. Rigid Bronchoscopy Course in Children, Turkish Pediatric Surgery Association Postgraduate Education Activities, 07-08.01.2018, Istanbul.
G8. Basic Endoscopy and Endoscopic Surgery Course in Children, TÇCD Education Board's Basic Education Activities, (1st Stage: E-Course 15 March-27 April 2018, 2nd Stage: Applied Course 28-29 April 2018, İstanbul.

H. Participation documents, certificates:

H1. Treatment of Gastroesophageal Reflux Disease and Esophageal Strictures: Colloquium/Workshop, Aegean Pediatric Thoracic Society; 18-19 April 2003, İzmir.
H2. 13th Hypospadias Day, Sexual Development and Hypospadias Society; Dr Roberto De Castro, Bologna, 1 December 2008, İstanbul.
H3. 26th National Pediatric Surgery Congress; European Accreditation Council for Continuing Medical Education (EACCME) Certificate, 16-18 June 2008, İstanbul.
H4. 29th National Congress of Pediatric Surgery (TCCD), Egyptian National Congress of Pediatric Surgery (EPSA), 2nd National Congress of Pediatric Urology (PEDURO) joint congress; 16-19 May 2011, Istanbul.
H5. 16th Hypospadias Day, Sexual Development and Hypospadias Association; Prof Dr Ahmed T. Hadıdı, 30 November 2012, Istanbul.
H6. 33rd National Congress of Pediatric Surgery; 28-31 October 2015, Antalya.
H7. 19th Hypospadias Day, Sexual Development and Hypospadias Association: Prof Dr Piet B. Hoebeke, Ghent University Hospital, Belgium, 5 December 2015, Istanbul.
H8. 1st Uludağ Pediatric Surgery Winter Symposium, 13-15 March 2016, Bursa.
H9. 34th National Pediatric Surgery and Pediatric Urology Congress; 26-30 October 2016 Kyrenia, TRNC.
H10. 20th Hypospadias Day and Workshop, Istanbul University Department of Pediatric Surgery and Department of Pediatric Urology, 2 December 2016, Istanbul.
H11. EUPSA Challenges in Pediatric Gastrointestinal Surgery, 17-18 February 2017, Ege University, Izmir.
H12. 35th National Pediatric Surgery Congress; 25-28 October 2017, Edirne.
H13. 21st Hypospadias Day, Sexual Development and Hypospadias Society: Prof Waifro Rigamontı, IRCCS San Raffaele di Milano, Italia Prof Ahmed Hadidi, President Hypospadias International Society, Prof Dr Hüseyin Özbey 2 December 2017 Istanbul.
H14. 36th National Pediatric Surgery Congress-3rd International Pediatric endoscopy surgery group-Middle East section congress; 24-27 October 2018, Izmir.
H15. Certificate of participation in the symposium on nutrition and adaptation in short bowel syndrome, 36th National Congress of Pediatric Surgery-3rd International Congress of Pediatric Endoscopy Surgery Group-Middle East section; 24-27 October 2018, Izmir.
H16. 22nd Hypospadias Day, Workshop on Reconstructive Genital Surgery in Children, Prof Dr Ricardo Gonzalez, Prof Dr Barbara Ludwikowski, 30 November-1 December 2018, Ankara.
H17. 23rd Hypospadias Day and Workshop, Istanbul University Department of Pediatric Surgery and Pediatric Urology, Dr Hüseyin Özbey and Dr Joao Luiz Pippi Salle, 24-25 May 2019, Istanbul.
H18. New perspectives in pediatric urology, Istanbul University, Cerrahpaşa, 6 December 2019, Istanbul.
H19. 37th National Congress of Pediatric Surgery; October 15-19, 2019, Ankara.
H20. 39th National Congress of Pediatric Surgery; November 2-5, 2022, Kuşadası.
H21. 40th National Congress of Pediatric Surgery; October 26-29, 2023, Ankara.

I. Award:

I1. Prof. Dr. İhsan Numanoğlu Scientific Research Award; S Çelebi, Ö Kuzdan, M Yazıcı, Seyithan Özaydın, C Beşik Beştaş, Z Mahmut, S Sander Urodynamic Evaluation of the Effect of Bladder Diverticulum on Bladder Functions: Experimental Rabbit Study, 33rd National Congress of Pediatric Surgery; October 28-31, 2015, Antalya.

J. Certificates of Achievement:

J1. Seyithan Özaydın: For your superior efforts and valuable contributions to health services in your position at Bağcılar Training and Research Hospital You have been awarded with a Certificate of Appreciation in accordance with Article 122 of the Civil Servants Law No. 657, Istanbul Health Directorate, 23.03.2010/1460.
J2. Seyithan Özaydın: Due to your efforts and participation in the relief efforts in the region regarding the Van Earthquake dated 23.10.2011, it has been deemed appropriate to award you with a Certificate of Achievement in accordance with Article 122 of the Civil Servants Law No. 657, Istanbul Governorship, 12.12.2011/459.

K. Book Chapter Authorship:

Seyithan Özaydın, Colorectal Cancers in Children, Multidisciplinary Approach in Oncology, ISBN: 978-2-38236-583-0, Livre de Lyon, October 2023.