Onursal Varlikli

Dr. Onursal Varlikli


Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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3 July 2024 in Pediatric Pulmonology
Verified
Journal Article
Closed access
MAMustafa Alper Akay
Mustafa Alper Akay
OTOzan Can Tatar
Ozan Can Tatar
ETElif Tatar
Elif Tatar
BTBeyza Nur Tağman
Beyza Nur Tağman
SMSemih Metin
Semih Metin
OVOnursal Varlikli
Onursal Varlikli

20 October 2025 in The Turkish Journal of Pediatrics
Verified
Journal Article
Open access
PDF file
OVOnursal Varlikli
Onursal Varlikli
MAMustafa Alper Akay
Mustafa Alper Akay
NSNecla Gürbüz Sarıkaş
Necla Gürbüz Sarıkaş
SMSemih Metin
Semih Metin
GYGülşen Ekingen Yıldız
Gülşen Ekingen Yıldız
Introduction. In recent years, there has been a significant rise in the number of pediatric cases involving multiple magnet ingestion, resulting in increased incidence and morbidity of injuries. When a metal object and magnet are ingested, either single or multiple, they can cause serious complications such as intestinal obstruction, ischemia, necrosis, fistula, perforation, and even death. This study aims to detail the complications and treatment approaches associated with magnet ingestion in children. Materials and Methods. In our study, we conducted a retrospective analysis of all cases involving the ingestion of a magnet along with a second metal object at two training and research hospitals in our province, which admit pediatric patients, between the years of 2013 and 2023. Results. A total of 42 patients had a history of magnet ingestion, with the number of ingested magnets ranging from 1 to 41. The median magnet size was 11 mm (range: 5.5-17.5 mm) and the median time to presentation was 24 hours (range: 3-48 hours). Thirteen patients (30.9%) required either endoscopic or surgical intervention to extract the magnets or address complications. Endoscopy was performed on eight patients, while surgical intervention was required for five patients. Among those who underwent surgery, four experienced complications, including intestinal perforation, ileoileal fistula, and internal herniation. Notably, no fatalities occurred following intervention. There was no statistically significant difference in age or magnet size between the interventional and non-interventional groups. However, the length of hospital stay was significantly longer in the interventional group compared to the non-interventional group (P

31 December 2020 in The Turkish Journal of Geriatrics
Verified
Journal Article
Open access
SMSemra Memi̇ş
Semra Memi̇ş
MSMesut Sancar
Mesut Sancar
OVOnursal Varlikli
Onursal Varlikli

13 April 2026 in Life
Verified
Journal Article
Open access
PDF file
MAMustafa Alper Akay
Mustafa Alper Akay
OTOzan Can Tatar
Ozan Can Tatar
ETElif Tatar
Elif Tatar
UDUğur Demirsoy
Uğur Demirsoy
YAYonca Anık
Yonca Anık
OVOnursal Varlikli
Onursal Varlikli
Preoperative differentiation of Wilms tumor and neuroblastoma on pediatric abdominal computed tomography (CT) images may be challenging because of overlapping imaging features. We aimed to develop an artificial intelligence-assisted lesion-localization model for exploratory diagnostic support in this differential setting. In this single-center, retrospective, image-level study, a YOLO26s detector was trained on preoperative contrast-enhanced CT PNG images with histopathology-anchored labels. The dataset comprised 3553 images, including 2103 lesion-positive images and 1450 background-negative images, partitioned into training, validation, and test subsets. On the held-out test set, the model achieved a precision of 0.954, a recall of 0.951, an mAP@0.5 of 0.977, and an mAP@0.5:0.95 of 0.732. Class-specific mAP@0.5:0.95 values were 0.734 for neuroblastoma and 0.730 for Wilms tumor. At the image level, tumor-present versus background-negative discrimination yielded 99.5% sensitivity, 89.0% specificity, a 93.0% positive predictive value, a 99.2% negative predictive value, and 95.3% accuracy. YOLO26s showed strong within-dataset performance for lesion localization and differential support between Wilms tumor and neuroblastoma.

15 March 2022 in Journal of Contemporary Medicine
Verified
Journal Article
Closed access
PDF file
YBYUSUF ATAKAN BALTRAK
YUSUF ATAKAN BALTRAK
SSSeniha Esin Söğüt
Seniha Esin Söğüt
OVOnursal Varlikli
Onursal Varlikli
Although breast masses are uncommon in children and adolescents, it is a worrying phenomenon for families when diagnosed.Breast masses in this age group are generally benign and most of them are seen in adolescents. Materials and Methods: The patient information was obtained from the hospital records and automation system. The patients were retrospectively analyzed with regards to age, complaints and their duration, family history, association with menstruation, location and size of the breast mass, methods of diagnosis, histopathological findings, and postoperative complications. Results: There was no difference between NOG and NG with respect to median age, body mass index, side and location of the mass, reason for admission, association with puberty, and follow-up time (p>0.05). When both groups were compared in terms of the size of the mass, the mass size was measured to be 2.2 cm (1.4-3) in NOG and 3.8 cm (3-8) in NG. There was no statistically significant difference between the two groups (p=0.12). Discussion and Conclusion: Surgical excision will be appropriate when a pediatric breast mass is detected in the neoplastic group, there is a family history, the size of the mass does not change or increase during follow-up, and malignancy is suspected on imaging.

1 June 2025 in Pediatric Academic Case Reports
Verified
Journal Article
Open access
PDF file
ÖPÖzge Serçe Pehlevan
Özge Serçe Pehlevan
MAMehmet Baha Aytaç
Mehmet Baha Aytaç
AUAyşe Nihan Uslan
Ayşe Nihan Uslan
SMSemih Metin
Semih Metin
OVOnursal Varlikli
Onursal Varlikli
AGAyla Gunlemez
Ayla Gunlemez
Megacystis-Microcolon-Intestinal Hypoperistalsis Syndrome (MMIHS) is a rare disorder characterized by smooth muscle dysfunction impairing the intestine and bladder. This disorder is commonly associated with a fatal prognosis. Here, we present a female neonate with antenatal clues who had abdominal distension since birth and underwent multiple exploratory laparotomies, and bladder distension requiring drainage by catheterisation. Unresponsive surgical procedures for bowel decompression were carried out. She was managed with total parenteral nutrition and jejunostomy. Mutation in the smooth muscle gamma-actin (ACTG2) gene confirmed the diagnosis. A timely high index of suspicion is crucial for neonates, especially females with abdominal and urinary distension. The early multidisciplinary assesment of the patient provides appropriate treatment modalities, and improves the survival.