Specialist Doctor Ahsen Dönmez Türkmen, M.D.

Career Summary:

• Turgut Özal University Hospital / Pediatrics Residency / 2010–2014
• Mardin State Hospital / Pediatrics Specialist / 2015–2017
• Acıbadem Ankara Hospital / Pediatrics Specialist / 2017–2018
• Istanbul University-Cerrahpasa, Cerrahpasa Faculty of Medicine / Fellowship in Pediatric Gastroenterology, Hepatology and Nutrition / 2020–2023
• Marmara University Faculty of Medicine / Pediatric Gastroenterology, Hepatology and Nutrition Specialist / 2023–2026

Fields of Study:

• Pediatric Gastrointestinal Disorders
• Inflammatory Bowel Disease
• Celiac Disease
• Food Allergies and Gastrointestinal Food Allergies
• Gastroesophageal Reflux Disease
• Chronic Abdominal Pain
• Chronic Diarrhea and Constipation
• Pediatric Liver Diseases
• Acute and Chronic Pancreatitis
• Nutritional Disorders and Malnutrition
• Pediatric Gastrointestinal Endoscopy

Professional Publications:

Articles Published in International Peer-Reviewed Journals:

• Dönmez Türkmen A, Tanalı G, Sarısaltık A, Şahin Akkelle B, Ertem D. Complete blood count parameters as predictors of disease phenotype in pediatric inflammatory bowel disease. Journal of Pediatric Gastroenterology and Nutrition. 2026;82(3):718–726. doi:10.1002/jpn3.70324. PMID: 41492254. / 2026
• Akkelle BS, Celik E, Dirimtekin E, Bagci İ, Donmez Turkmen A, Celikel C, Ertem D. PERCC1-Associated Congenital Diarrhea and Enteropathy: Description of a Novel Variant. Pediatric and Developmental Pathology. Published online May 31, 2026. doi:10.1177/10935266261450257. PMID: 42218606. / 2026
• Dönmez Türkmen A, Ünlü G, Musayeva G, Akkuş E, Özen AG, Önal P, et al. Can the Prognosis of COVID-19 Disease Be Determined by Fecal Markers and Cytokines? Journal of Interferon & Cytokine Research. 2022;42(10):542–549. doi:10.1089/jir.2022.0098. PMID: 36179036. / 2022
• Beşer ÖF, Uğur Karaboğa EP, Hepkaya E, Kılınç Sakallı AA, Dönmez Türkmen A, Dilek TD, et al. The Role of Telehealth Services in Children with Cystic Fibrosis During Coronavirus Disease 2019 Outbreak. Telemedicine and e-Health. 2022;28(6):832–837. doi:10.1089/tmj.2021.0228. PMID: 34619057. / 2022
• Beşer ÖF, Uğur Karaboğa EP, Hepkaya E, Kılınç Sakallı AA, Dönmez Türkmen A, Dilek TD, et al. The Effects of the COVID-19 Pandemic on Pediatric Cystic Fibrosis Patients. Indian Journal of Pediatrics. 2021;88(10):1054. doi:10.1007/s12098-021-03835-0. PMID: 34196931. / 2021
• Donmez A, Orun E, Sonmez FM. Vitamin D status in children with headache: A case-control study. Clinical Nutrition ESPEN. 2018;23:222–227. doi:10.1016/j.clnesp.2017.09.010. PMID: 29460803. / 2018
• Sönmez FM, Dönmez A, Ceylaner S, Üçtepe E, Aydın Hİ. An atypical case of pantothenate kinase-associated neurodegeneration (PKAN) initially presenting with stammering and speech disorder. Basic and Clinical Sciences. 2016;4(2):104–110. / 2016
• Sonmez FM, Donmez A, Namuslu M, Canbal M, Orun E. Vitamin D Deficiency in Children With Newly Diagnosed Idiopathic Epilepsy. Journal of Child Neurology. 2015;30(11):1428–1432. doi:10.1177/0883073814566627. PMID: 25637647. / 2015 
• Yilmaz AE, Donmez A, Orun E, Tas T, Isik B, Sonmez FM. Methylphenidate-induced acute orofacial and extremity dyskinesia. Journal of Child Neurology. 2013;28(6):781–783. doi:10.1177/0883073812449905. PMID: 22791547. / 2013
• Cizmeci MN, Kanburoglu MK, Akelma AZ, Donmez A, Sonmez FM, et al. Cerebral sinovenous thrombosis associated with MTHFR A1298C mutation in the newborn: a case report. Journal of Thrombosis and Thrombolysis. 2013;35(2):279–281. doi:10.1007/s11239-012-0776-9. PMID: 22797907. / 2013 
• Cizmeci MN, Kanburoglu MK, Akelma AZ, Donmez A, Duymaz S, Tatli MM. Syndrome of inappropriate antidiuretic hormone secretion refractory to treatment in a newborn with alobar holoprosencephaly. Genetic Counseling. 2013;24(3):313–318. PMID: 24341147. / 2013
• Yilmaz AE, Celik N, Soylu G, Donmez A, Yuksel C. Comparison of clinical and microbiological features of vulvovaginitis in prepubertal and pubertal girls. Journal of the Formosan Medical Association. 2012;111(7):392–396. doi:10.1016/j.jfma.2011.05.013. PMID: 22817817. / 2012

Book Chapters:

• Dönmez Türkmen A, Ertem D. Abdominal Pain in Children. In: Barlas Ulusoy N, İmeryüz N, eds. Current Advances in Disorders of Gut-Brain Interaction. 1st ed. Ankara: Türkiye Klinikleri; 2026. pp. 77–82.
• Dönmez Türkmen A, Akkuş E, Beşer ÖF, Çullu Çokuğraş F. Pediatric Gastroenterology Routines. Cerrahpaşa Pediatrics Routines. 2023. pp. 259–322.
• Dönmez A, Akkuş E, Beşer ÖF, Çullu Çokuğraş F. Definition and Characteristics of Human Milk Oligosaccharides. Nutrition in Healthy Children and Adolescents. 2022. pp. 173–189.
• Dönmez Türkmen A, Beşer ÖF. The Importance of Nutrition in Hospitalized Children. Nutrition in Chronic Diseases in Children. Ankara: Türkiye Klinikleri; 2021. pp. 108–114.

Memberships:

• European Society for Paediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN)
• Turkish Society for Pediatric Gastroenterology, Hepatology and Nutrition