Researcher:
Atçeken, Zeynep

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Doctor

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Zeynep

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Atçeken

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Atçeken, Zeynep

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2016 - 20207

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Researcher Of Publications: search.filters.isAuthorOfPublication.557bd605-0c23-4526-a1d9-4a321b88541b

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    Common and uncommon manifestations of granulomatosis with poliangiitis (GPA) at chest CT: a vasculitis center experience
    (BMJ Publishing Group, 2016) Taydaş, Ogün; Kılıç, Levent; Erden, Abdulsamet; Armağan, Berkan; Sarı, Alper; Akdoğan, Ali.; Ertenli, İhsan.; Karadağ, Ömer; Arıyürek, Macit Orhan; Atçeken, Zeynep; Doctor; N/A; Koç University Hospital; N/A
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    Double-domed horizontal fissure
    (Turkish Soc Radiology, 2016) Kabakus, Ismail Mikdat; Ariyurek, Orhan Macit; N/A; Atçeken, Zeynep; Doctor; N/A; Koç University Hospital; N/A
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    Nonthrombotic pulmonary artery embolism: imaging findings and review of the literature
    (Amer Roentgen Ray Soc, 2017) Unal, Emre; Balci, Sinan; Akpinar, Erhan; Ariyurek, Orhan Macit; N/A; Atçeken, Zeynep; Doctor; N/A; Koç University Hospital; N/A
    Objective: The purpose of this article is to emphasize the imaging findings encountered in the setting of nonthrombotic pulmonary embolism. Conclusion: Nonthrombotic pulmonary embolism refers to a spectrum of clinical and radiologic disorders caused by embolization of the pulmonary artery vasculature by various cell types, microorganism, and foreign bodies. Awareness of the imaging and clinical features of the nonthrombotic pulmonary embolism may facilitate prompt diagnosis.
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    PublicationOpen Access
    Changes in computed tomography findings of COVID-19 pneumonia: less extensive lung involvement with decreasing disease prevalence
    (Wiley, 2020) Gümüş, Terman; Cengiz, Duygu; Kartal, Furkan; Atçeken, Zeynep; Tekin, Süda; Atasoy, Kayhan Çetin; Doctor; Faculty Member; School of Medicine
    It has been observed that the degree of pulmonary involvement shown in chest computed tomography (CT) scans tended to decrease as the prevalence of coronavirus disease 2019 (COVID-19) infection decreased in the Turkish population. The purpose of this study was to investigate the relationship between the disease severity based on chest CT scans and the temporal evolution of the epidemic. This study recruited 179 patients with confirmed COVID-19 disease who had received a chest CT scan between March 14 and April 28, 2020. The participants were divided into three successive temporal groups based on their date of CT examination. The early (March 14-29), mid (March 30-April 13), and late (April 14-28) groups were compared regarding the presence and extent of pulmonary involvement and CT characteristics of lesions. COVID-19 pneumonia was less extensive in participants under 45 years of age and patients presenting late in the course of epidemic (i.e., the late group) compared those presenting earlier. When each group was subcategorized on the basis of age, older patients in the late group had less extensive lung involvement than older patients in the early group. However, there was no significant difference in the extent of lung involvement in younger patients between the late and early groups. The severity of COVID-19 pneumonia appears to be variable at different temporal windows of the epidemic curve and decreases in patients presenting in the later weeks compared to the earlier weeks, particularly in older patients.
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    PublicationOpen Access
    Expansion of the rib head: a novel computed tomographic feature of supernumerary intrathoracic ribs
    (Aves, 2017) Kabakuş, İsmail Mikdat; Arıyürek, Orhan Macit; N/A; Atçeken, Zeynep; Doctor; School of Medicine
    Intrathoracic ribs are very rare congenital anomalies. Approximately 50 cases have been reported in the literature till date. They are usually present on the right side, between the third and eighth ribs without sex predominance. They may originate from a vertebral body or the proximal or distal part of a rib. In most cases, they are asymptomatic, but they may be associated with developmental abnormalities of ribs and vertebrae. The diagnosis is important to prevent further investigation or intervention. Here we present two rare cases with supernumerary intrathoracic rib and describe a novel sign, namely expansion of the rib head. To the best of our knowledge, this is the shortest supernumerary intrathoracic rib, reported in the literature, on the left side originating from the head of the second rib, which could have been misdiagnosed as osteochondroma due to its atypical features.
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    PublicationOpen Access
    Reentrance of azygos vein into azygos fissure after pneumothorax
    (Aves, 2017) Taydaş, Onur; Arıyurek, Orhan Macit; N/A; Atçeken, Zeynep; Doctor; School of Medicine
    Empty azygos fissure implies dislocation of the azygos vein to the mediastinal side of the right upper lobe from azygos fissure, which is usually secondary to pneumothorax, pleural effusion, parenchymal fibrosis, vertebral collapse or persistent vomiting. We are presenting here a case where a separated azygos vein in CT and radiography images was noted. Moreover, in the follow-up images, it appeared that the complete reexpansion of the right lung resulted in reentrance of the azygos vein into azygos fissure in its native position.
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    PublicationOpen Access
    Radiological approach to COVID-19 pneumonia with an emphasis on chest CT
    (Aves, 2020) Güneyli, Serkan; Atçeken, Zeynep; Doğan, Hakan; Altınmakas, Emre; Atasoy, Kayhan Çetin; Doctor; Researcher; Other; Faculty Member; School of Medicine
    Coronavirus disease 2019 (COVID-19) has recently become a worldwide outbreak with several millions of people infected and more than 160.000 deaths. A fast and accurate diagnosis in this outbreak is critical to isolate and treat patients. Radiology plays an important role in the diagnosis and management of the patients. Among various imaging modalities, chest CT has received attention with its higher sensitivity and specificity rates. Shortcomings of the real-time reverse transcriptase-polymerase chain reaction test, including inappropriate sample collection and analysis methods, initial false negative results, and limited availability has led to widespread use of chest CT in the diagnostic algorithm. This review summarizes the role of radiology in COVID-19 pneumonia, diagnostic accuracy of imaging, and chest CT findings of the disease.