Person: BIYIKLI, ERHAN
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BIYIKLI
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ERHAN
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Publication Open Access Reliability of coeliac and superior mesenteric artery origin level in lumbosacral transitional vertebrae detection and vertebral numbering(2022-01-01) BALTACIOĞLU, FEYYAZ; BIYIKLI, ERHAN; Biyikli E., Sever I. H., BALTACIOĞLU F.the detection of lumbosacral transitional vertebrae (LSTV) and vertebral enumeration. Patients and Methods: Institutional review board approval was obtained. Routine lumbar magnetic resonance (MR) imaging that included sagittal cervicothoracic scout images in 972 cases were evaluated retrospectively. Six segments were created in the vertebral column with 7 lines. CA and SMA ostiums were localized in these segments. Results: Coeliac artery and SMA levels were detected more caudally in lumbarized S1 and more cranially in sacralized L5 cases compared to non-LSTV cases. Conclusion: Coeliac artery and SMA origin levels as anatomical markers are not dependable for vertebral numbering due to their wide variabilityPublication Open Access Pilocytic Astrocytoma of the Cerebellopontine Angle with cerebrospinal fluid Spread in an Adult: A Case Report(2022-12-01) KURŞUN, MELTEM; OĞUZSOY, TUBA; BOZKURT, SÜHEYLA; BAYRAKLI, FATİH; BIYIKLI, ERHAN; Bıyıklı E., Kurşun M., Oğuzsoy T., Bozkurt S., Bayraklı F.Introduction Pilocytic astrocytoma of the cerebellopontine angle (CPA) is uncommon, and its spread to the cerebrospinal fluid (CSF) at the time of diagnosis has not been reported in the literature. Case Presentation We report the case of a 33-year-old man with multifocal pilocytic astrocytoma diagnosed by magnetic resonance imaging (MRI) and confirmed by histopathological examination, and present the radiological and histopathological findings. Conclusion In the case herein reported, we observed spread of the pilocytic astrocytoma of the CPA to the CSF at the initial diagnosis, and early detection by MRI is very important regarding the treatment modality and prognosis.Publication Open Access The intensity or duration of inflammatory back pain has no impact on the detection of sacroiliitis by magnetic resonance imaging in axial spondyloarthritis(2023-06-15) BIYIKLI, ERHAN; BUĞDAYCI, ONUR; KUTLUĞ AĞAÇKIRAN, SEDA; ATAGÜNDÜZ, MEHMET PAMİR; SEVİK G., BIYIKLI E., BUĞDAYCI O., ABACAR K. Y., KUTLUĞ AĞAÇKIRAN S., ÇOLAKOĞLU ÖZKAYA Ş., EKİNCİ G., ATAGÜNDÜZ M. P.Background: Sacroiliac joint (SIJ) magnetic resonance imaging (MRI) is an established tool in the evaluation of patients with axial spondyloarthritis (axSpA). In the validation study of the ASAS classification criteria for axSpA, only 63.1% of patients had sacroiliitis on the SIJ-MRI.[1] Studies that enrolled patients with axSpA based on expert opinion reported the sensitivity of MRI between 35 to 42% in detecting sacroiliitis.[2,3] Objectives: This study aimed to evaluate the temporal relationship between ASAS defined positive MRI and the characteristics of low back pain (LBP) in axSpA. Methods: Following axSpA groups were enrolled in the study whenever an attending physician ordered an SIJ-MRI. Patients fulfilling both the Rudwaleit criteria for inflammatory back pain (IBP) and Amor criteria, patients with a previous classification with either modified New York or ASAS classification criteria.[1] A blinded rheumatologist (GS) recorded the intensity and duration of IBP using a questionnaire before SIJ-MRI. MRI appointments were based on availability. Therefore some patients did not have IBP at acquisition. Two radiologists assessed SIJ-MRIs using the ASAS/OMERACT MRI group definition of active sacroiliitis.[4] In case of discrepant reporting, a third experienced radiologist (GE) adjudicated the SIJ-MRIs. The probability of axSpA is estimated using sum scores for SpA features excluding the SIJ-MRI.[5] The correlation between an ASAS-defined positive MRI and LBP characteristics was analyzed. Results: Fifty-nine patients (32 F/27M) were included. Patient characteristics are given in Table 1. Overall, 28 of 59 patients (47.5%) had a positive SIJ-MRI defined by ASAS. The median duration of LBP was 15 (43) days and the highest intensity of LBP was felt 6.5 ± 1.2 days before the MRI appointment. At acqusition, 13 (22.0%) patients reported no LBP. There was no significant difference between the presence of LBP within 10 days prior to MRI and sacroiliitis on MRI. (p=0.6) (Sacroiliitis in 45.7% with, and 53.8% without LBP) In LBP reporting patients, pain duration and pain VAS score were 3.3 ±2.3 and 7.1 ±1.9 in patients with sacroiliitis, and 8.7 ±3.6 and 6.8 ±1.7 in patients without sacroiliitis on MRI, respectively. (p=0.48, p=0.10) Age, sex, BASDAI, CRP and calculated probability of axSpA had no correlation with the presence of sacroiliitis on MRI. Adding sacroiliitis on SIJ-MRI to axSpA probability score increased the rate of patients with a probability of >90% for axSpA from 71.2 to 83.1% but the rate of sacroiliitis on MRI was similar in all probability groups. Conclusion: These results suggest that the presence of LBP and the duration of intense pain do not affect the detected rate of sacroiliitis on SIJ-MRI in axSPA. The low prevalence of sacroiliitis in this study population implies its value as a classification tool. Further studies with larger sample sizes are needed to clarify the factors affecting the SIJ-MRI findings in axSpA patients.Publication Open Access Brain death in children: is computed tomography angiography reliable as an ancillary test?(2023-01-01) BIYIKLI, ERHAN; YAPICI, ÖZGE; ÖZTÜRK, MAKBULE NİLÜFER; Almus E., BIYIKLI E., YAPICI Ö., Almus F., Girgin F. I., Ozturk N.Background The diagnosis of brain death is primarily clinical. Sometimes ancillary tests are needed.Publication Open Access Radiological and clinical features of multinodular and vacuolating neuronal tumor (MVNT)(2023-01-01) BIYIKLI, ERHAN; Bıyıklı E., Kursun M., Altuntas D., Bayri Y., Baltacioglu F.Background: To investigate the imaging fndings and clinical features of multinodular and vacuolating neuronal tumor (MVNT). Methods: We retrospectively sought for cases that have suspicious imaging fndings for MVNT through the hospital information system. The patients’ demographics and clinical symptoms were extracted. All available images were re-examined. Results: Headache was the most common complaint (n=7). Other complaints included seizure, stroke-like symptoms and numbness. Conventional MRI revealed that all lesions consisted of tiny, sharply marginated, round or ovoid nodules following the gyral contour. These nodules were hyperintense on T2 and FLAIR WI, hypointense on T1 WI. All lesions were characterized by a lack of enhancement and difusion restriction. Mass efect and peripheral edema were not observed. MVNT presented as an incidental fnding in one case who complained gynecomastia and had pituitary adenoma on pituitary MRI. All lesions were supratentorial—mostly on the right side (10/11)—and located in subcortical white matter. Follow-up MRI was available for 11 patients with a mean of 14.8 months (3–40 months). No change in lesion size and morphology was observed in these follow-up images. Conclusions: Radiological and clinical follow-up data suggest MVNT may exhibit indolent behavior. If asymptomatic, patients can be followed by imaging alone. Surgery should be considered for symptomatic patients.