Şahin, Erkan
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Sahin, E.
Sahin, Erkan
Sahin, Erkan
Job Title
Email Address
erkan.sahin@ieu.edu.tr
Main Affiliation
09.02. Internal Sciences
Status
Current Staff
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Scopus Author ID
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WoS Researcher ID
Sustainable Development Goals
SDG data is not available
Documents
19
Citations
43
h-index
4
Documents
22
Citations
37
Scholarly Output
5
Articles
4
Views / Downloads
16/30
Supervised MSc Theses
0
Supervised PhD Theses
0
WoS Citation Count
2
Scopus Citation Count
2
Patents
0
Projects
0
WoS Citations per Publication
0.40
Scopus Citations per Publication
0.40
Open Access Source
3
Supervised Theses
0
| Journal | Count |
|---|---|
| Acta Medica Alanya | 1 |
| Fertılıty And Sterılıty | 1 |
| INJURY-International Journal of the Care of the Injured | 1 |
| Journal of Clinical Medicine | 1 |
| Journal of Surgical Case Reports | 1 |
Current Page: 1 / 1
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5 results
Scholarly Output Search Results
Now showing 1 - 5 of 5
Article Citation - WoS: 2Citation - Scopus: 2Differential Diagnosis of Submucosal Gastric Tumors: Gastric Schwannomas Misdiagnosed as Gists(Oxford Univ Press, 2024-12-01) Unver, Mutlu; Ertekin, Suleyman Caglar; Kebapci, Eyup; Olmez, Mustafa; Ergin, Erhan; Ozturk, Safak; Ortac, RagipSchwannomas commonly occur in the head and neck region but are rarely seen in the gastrointestinal tract; the stomach and small intestine are the most commonly involved sites. These tumors are usually misdiagnosed as gastrointestinal stromal tumors (GISTs) before histopathological confirmation due to radiological similarity. GI schwannomas show positivity for S100 protein and vimentin but are negative for CD 117 and CD 34, which helps in differentiating the tumor from GISTs. Case 1: a 70-year-old woman was referred to our hospital by complaints of abdominal pain and discomfort. Upper GI endoscopy demonstrated a protruding lesion at the lesser curvature of the gastric body, and fine-needle aspiration biopsy showed chronic inflammation without malignancy. Since the lesion was suspected to be GIST, this patient had surgery, and a gastric schwannoma was resected successfully. Case 2: a 66-year-old female with anemia and abdominal discomfort was found to have a submucosal elevated mass at the greater curvature of the antrum. Fine needle aspiration biopsy was suggestive of a spindle cell tumor resembling GIST. The patient underwent subtotal gastrectomy with Roux-en-Y reconstruction. Histopathology confirmed schwannoma. It is necessary to differentiate gastric schwannomas from other submucosal tumors of the stomach, especially GISTs. Surgical complete resection of schwannomas usually has a good prognosis with a low probability of recurrence. Though rare, gastric schwannomas should be included in the differential diagnosis of submucosal gastric tumors because the correct identification of this tumor type helps in proper management and evasion of unnecessary extensive surgery.Article Diagnostic Accuracy of Kidney Shear Wave Elastography at the Diagnosis of Ureteral Stones(2022-03-27) Serter, Selim; Yıldırım, Mahir Utku; Ors, Bumin; Şahin, Erkan; Solak, Aynur; Selim, Serter; Yıldırım, Utku MahirAim: To determine the efficacy of kidney shear wave elastography (SWE) in patients diagnosed with ureteral stones Method: Both kidneys of 30 patients were evaluated prospectively with SWE. The ureteral stone size and the degree of hydronephrosis were determined by sonographic examination. The contralateral kidney was accepted as the control parameter. Stone size, grade of hydronephrosis and kidney shear wave speed changes were noted and their relations were examined for statistical significance. Results: Affected kidney group had significantly increased SWE values than the control group. (3.87+-1.22 vs 2.06+-0.72 m/sec) (p=0.01). Neither the stone size nor the kidney SWE values showed a correlation with the gender. There was a positive correlation between the grade of hydronephrosis and the stone size (p=0.047, r=0,36). Kidneys with grade 2 hydronephrosis had significantly higher SWE values than those with grade 1 hydronephrosis. Conclusion: SWE is a promising tool to observe the parenchymal elasticity changes in patients with hydronephrosis secondary to ureteral stones. Further studies are necessary to confirm the research results.Article Associations Among CTA Collateral Scores, Multimodal MRI Lesion Volumes, and Clinical Severity in Acute Middle Cerebral Artery Infarction(MDPI, 2026-03-21) Gulluoglu, Halil; Sahbaz, Fatma Gulhan; Uysal, Hasan Armagan; Sahin, ErkanBackground/objectives: In this study, we aimed to investigate acute infarct volume on magnetic resonance diffusion-weighted imaging (MRI DWI), chronic infarct volume on FLAIR (fluid-attenuated inversion recovery), hypoperfused area volume on PWI (perfusion-weighted imaging), stenosis locations and rates on CT (computerized tomography) angiography, CT angiography collateral scoring, and correlation of background data and etiological factors with neurological clinical findings in patients with acute middle cerebral infarction. Methods: A total of 117 patients with MCA (middle cerebral artery) infarction were hospitalized for diagnosis and treatment after undergoing CT angiography within 9 h of symptom onset. Comparative results of Souza's collateral score system, MRI parameters, and clinical outcomes were determined. Results: According to the Souza CS system, 23 patients were in the malignant profile and 94 in the good profile. There was a statistically significant difference between the malignant and benign profiles in terms of DWI volume, hypoperfused area volume on PWI sequence, white matter assessment using the Fazekas scale, and supratentorial and infratentorial chronic infarct volume on the FLAIR sequence (p < 0.001, p < 0.001, p < 0.001, p < 0.001, p < 0.001). Conclusions: Patients with a malignant profile on CTA may have a larger infarct volume and worse functional outcome. This should be recognized, and these patients should be followed up more carefully and attentively than those with good collateral scores.Article Toward a New Era in Fracture Imaging: Zero Echo Time MRI Vs CT in Intra-Articular Distal Radius Fractures — A Proof-of Study(Elsevier Ltd, 2025-12) Kaymakoğlu, M.; Kolac, U.C.; Bahsi, A.; Filibeli, M.; Türken, M.A.; Dogan, K.; Şahin, E.Background Computed tomography (CT) is the current reference standard for evaluating intra-articular distal radius fractures, however concerns remain regarding radiation exposure and limited soft tissue assessment. Zero Echo Time (ZTE) MRI is a novel technique that enables direct cortical bone imaging with contrast similar to CT, while avoiding radiation. This proof-of-concept study aimed to compare the diagnostic performance of ZTE MRI with CT in fracture classification, articular involvement, and treatment planning. Methods In this prospective comparative study, 28 patients with acute intra-articular distal radius fractures underwent both CT and ZTE MRI within 7 days of injury. Fractures were classified according to AO/OTA, Fernandez classifications, quantitative parameters (angulation, radial inclination, ulnar variance, articular fragment count) and binary findings (distal ulna fracture, distal radioulnar joint (DRUJ) involvement) were assessed. Two orthopedic surgeons and two musculoskeletal radiologists independently reviewed all images. Inter- and intraobserver agreement was calculated using Cohen’s and Fleiss’ kappa and intraclass correlation coefficients. Results Agreement among surgeons for AO/OTA classification was good on CT (κ = 0.767) and good on ZTE MRI (κ = 0.680). For Fernandez classification, agreement was good on CT (κ = 0.780) and ZTE (κ = 0.736). Surgeons demonstrated higher agreement (κ ≈0.68–0.78) than radiologists (κ ≈0.56–0.65). For binary parameters, agreement among radiologists was very good (κ = 0.820–0.880), while inter-surgeon agreement ranged from moderate to good (κ = 0.500–0.714). Continuous measures showed good reproducibility for angulation (ICC = 0.762–0.858), but lower values for inclination among surgeons (ICC ≤ 0.492–0.531). ZTE MRI demonstrated sensitivity, specificity, and accuracy comparable to CT for classification and detection of DRUJ involvement and distal ulna fractures (approximately 85–93 %). Treatment decisions showed very good agreement (κ = 0.855), with ZTE altering CT-based management in 3/28 (10.7 %) cases for Surgeon 1 and 2/28 (7.1 %) for Surgeon 2. Conclusion ZTE MRI provides diagnostic performance comparable to CT for intra-articular distal radius fractures, with high reliability for fracture classification, joint involvement, and treatment decision-making. As a radiation-free modality that also permits concurrent soft tissue assessment, ZTE MRI may serve as a promising alternative to CT in selected clinical scenarios. © 2025 Elsevier Ltd.Conference Object Novel Tool for Endonietrial Assessment in Embryo Transfer Cycles: Endometrial Elastograpry.(Elsevier Science Inc, 2022) Emirdar, Volkan; Gode, Funda; Pala, Ibrahim; Sahin, Erkan[Abstract Not Available]
