Yitik, Ahmet Yasin

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Name Variants
Yitik, A.Y. Yitik, A. Y. Yitik, Ahmet Yasin. A. Y. Yitik
Job Title
Email Address
ahmety@pau.edu.tr
Main Affiliation
14.02. Internal Medicine
Status
Current Staff
Website
ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
No research topics data found.

Sustainable Development Goals

NO POVERTY1
NO POVERTY
0
Research Products
ZERO HUNGER2
ZERO HUNGER
0
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GOOD HEALTH AND WELL-BEING3
GOOD HEALTH AND WELL-BEING
1
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QUALITY EDUCATION4
QUALITY EDUCATION
0
Research Products
GENDER EQUALITY5
GENDER EQUALITY
0
Research Products
CLEAN WATER AND SANITATION6
CLEAN WATER AND SANITATION
0
Research Products
AFFORDABLE AND CLEAN ENERGY7
AFFORDABLE AND CLEAN ENERGY
0
Research Products
DECENT WORK AND ECONOMIC GROWTH8
DECENT WORK AND ECONOMIC GROWTH
0
Research Products
INDUSTRY, INNOVATION AND INFRASTRUCTURE9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
0
Research Products
REDUCED INEQUALITIES10
REDUCED INEQUALITIES
0
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SUSTAINABLE CITIES AND COMMUNITIES11
SUSTAINABLE CITIES AND COMMUNITIES
0
Research Products
RESPONSIBLE CONSUMPTION AND PRODUCTION12
RESPONSIBLE CONSUMPTION AND PRODUCTION
0
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CLIMATE ACTION13
CLIMATE ACTION
0
Research Products
LIFE BELOW WATER14
LIFE BELOW WATER
0
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LIFE ON LAND15
LIFE ON LAND
0
Research Products
PEACE, JUSTICE AND STRONG INSTITUTIONS16
PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
PARTNERSHIPS FOR THE GOALS17
PARTNERSHIPS FOR THE GOALS
0
Research Products
This researcher does not have a Scopus ID.
This researcher does not have a WoS ID.
No records found in other affiliations.
Scholarly Output

9

Articles

6

Views / Downloads

554/581

Supervised MSc Theses

0

Supervised PhD Theses

0

WoS Citation Count

3

Scopus Citation Count

3

Patents

0

Projects

0

WoS Citations per Publication

0.33

Scopus Citations per Publication

0.33

Open Access Source

4

Supervised Theses

0

JournalCount
American Journal of Emergency Medicine1
American Journal of Physical Medicine & Rehabilitation1
British Journal of Hospital Medicine1
Erciyes Medical Journal1
Journal of Computer Assisted Tomography1
Current Page: 1 / 2

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Scholarly Output Search Results

Now showing 1 - 9 of 9
  • Editorial
    Lintracranial Germinoma Metastasizing to the Liver
    (Erciyes Univ Sch Medicine, 2022) Yitik, Ahmet Yasin; Sagtas, Ergin; Ufuk, Furkan
  • Editorial
    Transfascial Muscle Herniation of the Forearm: A Visual Vignette
    (Lippincott Williams & Wilkins, 2025-08-15) Yitik, Ahmet Yasin; Sabir, Nuran; Tonkaz, Gokhan; Ufuk, Furkan
  • Article
    Citation - WoS: 2
    Citation - Scopus: 2
    An unusual complication of urinary stone disease: Spontaneous ureteral rupture
    (W.B. Saunders, 2020-05) Yitik, Ahmet Yasin; Celen, Sinan; Ufuk, Furkan
    Spontaneous ureter rupture (SUR) is a rare condition that can present mimicking many acute abdominal diseases. There is no probable explanation of the theoretical mechanism of spontaneous ureter rupture in the literature. Mostly calculus can cause spontaneous ureter rupture with ureteral obstruction. If left untreated, it can lead to life-threatening complications. Herein we report a case of SUR that was occurred due to urinary stone disease in a male patient who presented with abdominal pain. A non-contrast enhanced and a late phase contrast-enhanced abdominal computed tomography (CT) demonstrated the urinary stone disease and contrast extralumination from the proximal part of the left ureter. We also aimed to emphasize the clinical and CT imaging findings of SUR. © 2018 Elsevier Inc.
  • Specialist Thesis
    Meme kitlelerinin tanısında superb mikrovasküler görüntüleme (SMI) ile kontrastlı dinamik manyetik rezonans görüntüleme’nin (MRG) karşılaştırılması
    (2024) Yitik, Ahmet Yasin; Akkoyunlu, Nuran Sabir
    Çalışmamız prospektif ve kesitsel özellikte olup amacımız meme kitlelerinin tanısında histopatolojik sonuçlar temel alınarak superb mikrovasküler görüntüleme (SMG) ile dinamik kontrastlı meme manyetik rezonans görüntüleme (MRG) yöntemlerinin tanısal doğruluklarını karşılaştırmak ve SMG’nin meme lezyonlarının tanısındaki başarısını değerlendirmektir. Üniversitemizin etik kurulundan onay alındıktan sonra, Nisan 2022 ile Mart 2024 tarihleri arasında Pamukkale Üniversitesi Tıp Fakültesi Hastanesine meme kitlesi şikayetiyle başvuran hastalara gri skala ultrasonografi, SMG, ve dinamik kontrastlı meme MRG yöntemleri yapıldı. Hastalara öncelikle gri skala ultrasonografi (USG) ve SMG metotları uygulandı. Ertesi gün hastalara dinamik kontrastlı meme MRG tetkiki yapıldı. Superb Mikrovasküler Görüntüleme tetkiki sırasında tüm lezyonu kapsayacak şekilde serbest ROI (ilgilenilen alan) çizilerek cihaz tarafından otomatik olarak vasküler indeks (VI) ölçümleri yapıldı. Ölçümler 5 yıllık uzmanlık öğrencisi tarafından yapılıp PACS’a (Picture Archive Communicating Systems) gönderildi. Her lezyondan en az üçer defa ölçüm yapılıp en uygun olan 3 ölçümün ortalaması çalışmaya dahil edildi. Meme MRG ve gri skala USG tetkikleri kendi BI-RADS sınıflamasına göre 25 yıllık meme radyolojisinde tecrübeli radyolog ve 5 yıllık radyoloji uzmanlık öğrencisi ile konsensus eşliğinde değerlendirildi. Tüm bulgular histopatolojik tanı sonuçları ile karşılaştırıldı. Çalışmaya 110 hasta (16-80 yaş, ortalama 47,67±13,57 yıl) ve 112 lezyon dahil edilmiştir. Histopatolojik olarak 62 lezyon benign, 50 lezyon ise malign olarak sonuçlandı. Gri skala ultrasonografik incelemede, malign kitlelerin %58’i düzensiz şekilli, %98’i düzensiz kenarlı, %86’sı dik yerleşimli, %96’sı hipoekojen ekopaternde ve %64’ünün akustik gölgelenmesinin olduğu saptanmıştır. Benign lezyonların %90,3 ü oval-yuvarlak şekilli, %56’sı düzgün kenar yapısında, %77,4’ü yatay yerleşimli, %54,8’i hipoekojen paternde olduğu ve %90,3’ünün akustik gölgelenmesinin olmadığı görüldü. Ultrasonografik incelemede %86 duyarlılık, %64,38 özgüllük ve %70,5 doğruluk oranları elde edilmiştir. Superb Mikrovasküler Görüntüleme ile ölçülen VI değerleri, malign kitlelerde belirgin şekilde yüksek bulunmuştur (p<0.001). VI kesim değeri 4.15 kabul edildiğinde duyarlılık, özgüllük, pozitif öngörü değeri (PÖD), negatif öngörü değeri (NÖD) ve doğruluk değerleri sırasıyla %92, %60, %64.8, %90.2, %74 olarak hesaplandı. Ayrıca VI değerleri ile USG’de lezyonun morfolojik özelliklerinden lezyon kenar yapısı, oryantasyonu, ekojenitesi ve akustik gölgelenmenin varlığı arasında da anlamlı ilişki saptandı (p<0.05). Vasküler indeks değeri ile lezyon şekli arasında ise istatistiksel olarak anlamlı ilişki saptanmadı (p>0.05). Lezyon boyutu ile serbest olarak çizilen ROI arasında da pozitif yönlü yüksek derecede istatistiksel olarak anlamlı ilişki bulundu (p<0.001). Çalışmamızda gri skala USG’de BI-RADS 4a olarak raporlanan lezyonlardan VI kesim değerinin (4.15) altındakilerin hepsinin histopatoloji tanı sonuçları benign olarak sonuçlandı.Dinamik kontrastlı meme MRG incelemesinde, malign lezyonların %76’sı düzensiz şekilli, %62’sinin spiküle kenarlı olduğu, %88’inin heterojen kontrastlandığı ve %64’ünün tip 3 kontrastlanma kinetik eğrisine sahip olduğu görüldü. Benign lezyonların ise %46.8’sinin yuvarlak şekilli, %80.6’sının düzgün kenar yapısına sahip, %77.4’ünün homojen kontrastlandığı ve %74.2’sinin tip 1 kontrastlanma kinetik eğrisine sahip olduğu görüldü. Manyetik Rezonans Görüntüleme incelemesinde ise duyalılığı %98, özgüllüğü %80.65, PÖD’i %80.3, NÖD’i %98 ve doğruluğu %88.39 hesaplandı. Vasküler indeks değerleri ile MRG kontrastlanma kinetik eğri tipleri arasında anlamlı korelasyon gösterildi (p<0.001). MRG incelemesi sırasında kontrastlanma izlenmeyen 4 lezyonun 3’ünde SMG’de akım saptandı.Sonuç olarak, SMG tekniği ile elde edilen VI parametresinin gri skala ultrasonografi ve dinamik MRG bulguları ile değerlendirilmesinin, meme kitlelerinin benign/malign ayrımında faydalı olabileceği gösterilmiştir.
  • Article
    A Young Boy with Renal Agenesis and Ectopic Seminal Vesicle: Zinner Syndrome
    (Galenos Publishing House, 2023-03-01) A.Y., Yitik; F., Ufuk; S., Çelen
    Zinner syndrome is a rare disorder, and it is associated with unilateral renal agenesis, ipsilateral ejaculatory duct atresia (obstruction), and cystic dilatation of the ipsilateral seminal vesicle. Here, we present an eighteen-year-old male with Zinner syndrome who presented to a urology clinic with perineal/pelvic pain and dysuria. We also emphasize the computed tomography and magnetic resonance imaging findings of Zinner syndrome. © Copyright 2023 by the Association of Urological Surgery / Journal of Urological Surgery published by Galenos Publishing House.
  • Article
    Comparative Evaluation of Superb Microvascular Imaging and Dynamic Contrast-Enhanced Magnetic Resonance Imaging in Differentiating Benign and Malignant Breast Masses
    (John Wiley and Sons Ltd, 2025-02-24) Yitik, Ahmet Yasin; Sabir, Nuran; Yilmaz, Sevda
    Objectives: Our study aims to compare the diagnostic performance of superb microvascular imaging (SMI) and dynamic contrast-enhanced magnetic resonance imaging (MRI) in differentiating benign from malignant breast masses, using histopathological findings as the reference standard. Methods: This prospective study was conducted from April 2022 to March 2024. A total of 112 breast lesions from 110 patients were evaluated using gray-scale ultrasonography, SMI, and dynamic contrast-enhanced MRI. The vascular index (VI) obtained during SMI examination and kinetic curve patterns from MRI were analyzed. Results: Histopathological analysis revealed 62 benign and 50 malignant lesions. The VI showed a statistically significant difference between benign and malignant lesions, with a mean VI of 5.12 ± 4.66 in benign masses and 10.13 ± 5.48 in malignant masses (P <.001). The ROC analysis demonstrated an AUC of 0.79 for SMI with a VI cut-off value of 4.15, yielding a sensitivity of 92%, specificity of 60%, and accuracy of 74%. A statistically significant correlation was found between VI values and MRI contrast enhancement kinetic curve types (P <.05). MRI demonstrated superior diagnostic performance, with an AUC of 0.89 and sensitivity, specificity, and accuracy of 98, 80.65, and 88.39%, respectively. Conclusions: SMI, when used in conjunction with conventional ultrasonography and MRI, provides significant diagnostic value in differentiating benign from malignant breast masses. The study supports the potential integration of SMI into routine breast cancer diagnostic workflows, particularly in settings where MRI is less accessible. © 2025 Elsevier B.V., All rights reserved.
  • Article
    Citation - WoS: 1
    Citation - Scopus: 1
    Paraspinal cervical chordoma
    (MA Healthcare Ltd, 2023-12-02) Tonkaz, Gokhan; Yitik, Ahmet Yasin; Tonkaz, Mehmet; Tonkaz, Duygu Erkal; Sade, Recep
    [No abstract available]
  • Article
    Patellar Osteochondroma [Ostéochondrome patellaire]
    (Elsevier Masson s.r.l., 2024-03) G., Tonkaz; A.Y., Yitik; M., Tonkaz; D.E., Tonkaz; R., Sade
    [No abstract available]
  • Article
    Patients with post-covid-19 respiratory condition: chest computed tomography findings and pulmonary function tests and comparison with asymptomatic participants
    (Lippincott Williams & Wilkins, 2024-01-09) Ufuk, Furkan; Yitik, Ahmet Yasin; Sarilar, Burak; Altinisik, Goksel
    Objective: The aims of this study were to assess the chest computed tomography (CT) findings in post-COVID-19 respiratory condition (rPCC) patients and compare the findings with asymptomatic participants (APs). It also aimed to evaluate the relationship between CT findings and pulmonary function tests (PFTs) in rPCC patients. Finally, it aimed to compare the quantitative chest CT findings and PFT results of patients with rPCC and APs. Methods: We retrospectively enrolled consecutive patients with rPCC who underwent unenhanced chest CT and PFTs between June 2020 and September 2022. In addition, a control group (APs) was prospectively formed and underwent nonenhanced chest CT and PFTs. The presence and extent of abnormalities in unenhanced chest CT images were evaluated qualitatively and semiquantitatively in a blinded manner. We used fully automatic software for automatic lung and airway segmentation and quantitative analyses. Results: Sixty-three patients with rPCC and 23 APs were investigated. Reticulation/interstitial thickening and extent of parenchymal abnormalities on CT were significantly greater in the rPCC group than in the control group (P = 0.001 and P = 0.004, respectively). Computed tomography extent score was significantly related to length of hospital stay, age, and intensive care unit stay (all Ps <= 0.006). The rPCC group also had a lower 85th percentile attenuation lung volume (P = 0.037). The extent of parenchymal abnormalities was significantly correlated with carbon monoxide diffusing capacity (r = -0.406, P = 0.001), forced vital capacity (FVC) (r = -0.342, P = 0.002), and forced expiratory volume in 1 second/FVC (r = 0.427, P < 0.001) values. Pulmonary function tests revealed significantly lower carbon monoxide diffusing capacity (P < 0.001), FVC (P = 0.036), and total lung capacity (P < 0.001) values in the rPCC group. Conclusions: The rPCC is characterized by impaired PFTs, a greater extent of lung abnormalities on CT, and decreased 85th percentile attenuation lung volume. Advanced age, intensive care unit admission history, and extended hospital stay are risk factors for chest CT abnormalities.