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    Evaluation of abdominal computed tomography findings in patients with COVID-19: a multicenter study
    (Turkish Soc Radiology, 2023) Onur, Mehmet Ruhi; Ozbay, Yakup; Idilman, Ilkay; Karaosmanoglu, Ali Devrim; Ramadan, Selma Uysal; Barlik, Funda; Aydin, Sonay
    PURPOSETo evaluate the frequency of abdominal computed tomography (CT) findings in patients with coronavirus disease-2019 (COVID-19) and interrogate the relationship between abdominal CT findings and patient demographic features, clinical findings, and laboratory test results as well as the CT atheroscle-rosis score in the abdominal aorta.METHODSThis study was designed as a multicenter retrospective study. The abdominal CT findings of 1.181 patients with positive abdominal symptoms from 26 tertiary medical centers with a positive polymerase chain-reaction test for severe acute respiratory syndrome coronavirus 2 were reviewed. The frequency of ischemic and non-ischemic CT findings as well as the association between CT findings, clinical features, and abdominal aortic calcific atherosclerosis score (AA-CAS) were recorded.RESULTSIschemic and non-ischemic abdominal CT findings were detected in 240 (20.3%) and 328 (27.7%) patients, respectively. In 147 patients (12.4%), intra-ab-dominal malignancy was present. The most frequent ischemic abdominal CT findings were bowel wall thickening (n = 120; 10.2%) and perivascular infil-tration (n = 40; 3.4%). As for non-ischemic findings, colitis (n = 91; 7.7%) and small bowel inflammation (n = 73; 6.2%) constituted the most frequent disease processes. The duration of hospital stay was found to be higher in patients with abdominal CT findings than in patients without any positive findings (13.8 & PLUSMN; 13 vs. 10.4 & PLUSMN; 12.8 days, P < 0.001). The frequency of abdominal CT findings was significantly higher in patients who did not survive the infection than in patients who were discharged after recovery (41.7% vs. 27.4%, P < 0.001). Increased AA-CAS was found to be associated with a higher risk of ischemic conditions in abdominal CT examinations.CONCLUSIONAbdominal symptoms in patients with COVID-19 are usually associated with positive CT findings. The presence of ischemic findings on CT correlates with poor COVID-19 outcomes. A high AA-CAS is associated with abdominal ischemic findings in patients with COVID-19.
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    Nadir Bir Akut Karın Nedeni: Situs İnversus Totalis ve Akut Apandisit
    (İnönü Üniversitesi Tıp Fakültesi Dergisi, 2007) Katman, Ünal; Onur, Mehmet Ruhi
    Abdominal ağrı acil servise başvurularda en sık görülen semptomlardan biridir. Apandisit abdominal ağrı ile başvuran hastalarda görülen en sık cerrahi gerektiren hastalıktır. Sol alt kadran ağrısı ile başvuran apandisit olgularında yanlış negatif tanı oranı yüksektir. Solda yerleşimli apandisit situs inversus ve intestinal malrotasyonla birlikte görülebilir. Çalışmada sol taraflı akut apandisit tanısı almış bir situs inversus totalis olgusu sunulacaktır.
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    The role of apparent diffusion coefficient values in differentiation between adrenal masses
    (Elsevier Science Inc, 2014) Cicekci, Mehtap; Onur, Mehmet Ruhi; Aydin, Ayse Murat; Gul, Yeliz; Ozkan, Yusuf; Akpolat, Nusret; Kocakoc, Ercan
    The aim of this study was to evaluate the utility of apparent diffusion coefficient (ADC) values in differentiation between solid adrenal masses. The ADC values of 73 adrenal lesions (54 benign, 19 malignant) in 69 patients were measured at b 100, 600 and 1000 gradients on diffusion-weighted magnetic resonance imaging (DW-MRI). No statistically significant difference was found between ADC values of benign and malignant adrenal masses, nonadenomatous benign adrenal masses and malignant adrenal masses, adrenal adenomas and nonadenomatous lesions, adenomas and metastases, adenomas and pheochromocytomas, metastases and pheochromocytomas. ADC values are not helpful in the differentiation between solid adrenal masses. (C) 2014 Elsevier Inc. All rights reserved.
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    Utility of ADC measurement on diffusion-weighted MRI in differentiation of prostate cancer, normal prostate and prostatitis
    (Ame Publishing Company, 2013) Esen, Meltem; Onur, Mehmet Ruhi; Akpolat, Nusret; Orhan, Irfan; Kocakoc, Ercan
    To determine the utility of apparent diffusion coefficient (ADC) values in differentiation of prostate cancer from normal prostate parenchyma and prostatitis we obtained ADC values of 50 patients at b 100, 600 and 1,000 s/mm(2) diffusion gradients. The ADC values of prostate cancer group were significantly lower than normal prostate and prostatitis group at b 600 and 1,000 s/mm(2) gradients. The ADC values at high diffusion gradients may be used in differentiation prostate cancer from normal prostate and prostatitis.