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  1. Article ; Online: Advanced MR imaging features of uncontrolled phenylketonuria in an adult patient.

    Ayasli, Alper / Ogul, Hayri / Onbas, Omer

    Arquivos de neuro-psiquiatria

    2023  Volume 81, Issue 1, Page(s) 99–100

    Title translation Recursos avançados de imagem de RM de fenilcetonúria descontrolada em um paciente adulto.
    MeSH term(s) Humans ; Adult ; Phenylketonurias/diagnostic imaging ; Magnetic Resonance Imaging
    Language English
    Publishing date 2023-03-14
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 418916-4
    ISSN 1678-4227 ; 0004-282X
    ISSN (online) 1678-4227
    ISSN 0004-282X
    DOI 10.1055/s-0043-1761293
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  2. Article: Advanced MR imaging features of uncontrolled phenylketonuria in an adult patient

    Ayasli, Alper / Ogul, Hayri / Onbas, Omer

    Arquivos de Neuro-Psiquiatria

    2023  Volume 81, Issue 01, Page(s) 99–100

    Language English
    Publishing date 2023-01-01
    Publisher Thieme Revinter Publicações Ltda.
    Publishing place Stuttgart ; New York
    Document type Article
    ZDB-ID 418916-4
    ISSN 1678-4227 ; 0004-282X
    ISSN (online) 1678-4227
    ISSN 0004-282X
    DOI 10.1055/s-0043-1761293
    Database Thieme publisher's database

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  3. Article ; Online: Shear wave elastography and T2* mapping in the detection of early-stage trochlear cartilage damage.

    Kaplan, Meral / Guclu, Derya / Unlu, Elif Nisa / Ogul, Hayri / Onbas, Omer

    Acta radiologica (Stockholm, Sweden : 1987)

    2023  Volume 64, Issue 9, Page(s) 2535–2540

    Abstract: Background: The presence of degenerative changes in joint cartilage is one of the major features in osteoarthritis.: Purpose: To investigate the contribution of shear wave elastography and T2* mapping to the early diagnosis of femoral trochlear ... ...

    Abstract Background: The presence of degenerative changes in joint cartilage is one of the major features in osteoarthritis.
    Purpose: To investigate the contribution of shear wave elastography and T2* mapping to the early diagnosis of femoral trochlear cartilage damage.
    Material and methods: A total of 30 individuals whose trochlear cartilage structure was evaluated as normal in conventional magnetic resonance imaging (MRI) sequences (control group) were prospectively compared with 30 patients who had early-stage cartilage damage findings on conventional MRI (study group), by performing B-mode ultrasonography, shear wave elastography, and T2* mapping. Cartilage thickness, shear wave, and T2* mapping measurements were recorded.
    Results: After evaluating B-mode ultrasound and conventional MRI sequences, cartilage thickness was found to be significantly higher in the study group on both B-mode ultrasound and MRI. Shear wave velocity values of the study group (medial condyle [MC] 4.65 ± 1.11 m/sn, intercondylar [IC] 4.74 ± 1.20 m/sn, and lateral condyle [LC] 5.42 ± 1.48 m/sn) were observed to be significantly lower than the control group (MC 5.60 ± 0.77 m/sn, IC 5.85 ± 0.96 m/sn, and LC 5.63 ± 1.05 m/sn) (
    Conclusion: Shear wave elastography and T2* mapping are reliable methods for evaluating early-stage trochlear cartilage damage.
    MeSH term(s) Humans ; Elasticity Imaging Techniques ; Cartilage, Articular/diagnostic imaging ; Cartilage, Articular/pathology ; Femur/diagnostic imaging ; Ultrasonography ; Bone and Bones ; Magnetic Resonance Imaging/methods
    Language English
    Publishing date 2023-07-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 105-3
    ISSN 1600-0455 ; 0284-1851 ; 0349-652X
    ISSN (online) 1600-0455
    ISSN 0284-1851 ; 0349-652X
    DOI 10.1177/02841851231185522
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  4. Article ; Online: Tortuous vertebral artery triggering vertebral foramen expansion and radiculopathy in a 19-year-old patient: a case report.

    Naldemir, Ibrahim F / Unlu, Elif Nisa / Onbas, Omer

    Journal of medical case reports

    2020  Volume 14, Issue 1, Page(s) 170

    Abstract: Background: Arterial tortuosity is a widespread condition commonly occurring in cerebral arteries and often associated with the elderly. Moderate arterial tortuosity is often not symptomatic, but if there is severe tortuosity, various symptoms may occur, ...

    Abstract Background: Arterial tortuosity is a widespread condition commonly occurring in cerebral arteries and often associated with the elderly. Moderate arterial tortuosity is often not symptomatic, but if there is severe tortuosity, various symptoms may occur, depending on the localization. In the literature, many factors have been reported as causing tortuosity in the vertebral arteries. In this case report, considering the age of our patient, we propose that, in addition to these previously reported reasons, congenital factors may also contribute to this situation.
    Case presentation: We present a case of a 19-year-old Turkish patient with a tortuous vertebral artery causing pain and tingling in the right shoulder and neck. Magnetic resonance imaging revealed vertebral foramen enlargement thought to be secondary to a loop formation in the vertebral artery. The diagnosis was confirmed by magnetic resonance angiography.
    Conclusions: There are many causes of cervical radiculopathy. Arterial tortuosity, a rare cause of radiculopathy, should be considered as a differential diagnosis. Consideration of the existence of this variation is of great importance in preventing possible dangerous complications during surgery.
    MeSH term(s) Adult ; Aged ; Cervical Vertebrae ; Humans ; Magnetic Resonance Angiography ; Radiculopathy/diagnostic imaging ; Radiculopathy/etiology ; Spinal Canal ; Vertebral Artery/diagnostic imaging ; Young Adult
    Language English
    Publishing date 2020-09-28
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 2269805-X
    ISSN 1752-1947 ; 1752-1947
    ISSN (online) 1752-1947
    ISSN 1752-1947
    DOI 10.1186/s13256-020-02493-8
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  5. Article ; Online: Tortuous vertebral artery triggering vertebral foramen expansion and radiculopathy in a 19-year-old patient

    Ibrahim F. Naldemir / Elif Nisa Unlu / Omer Onbas

    Journal of Medical Case Reports, Vol 14, Iss 1, Pp 1-

    a case report

    2020  Volume 3

    Abstract: Abstract Background Arterial tortuosity is a widespread condition commonly occurring in cerebral arteries and often associated with the elderly. Moderate arterial tortuosity is often not symptomatic, but if there is severe tortuosity, various symptoms ... ...

    Abstract Abstract Background Arterial tortuosity is a widespread condition commonly occurring in cerebral arteries and often associated with the elderly. Moderate arterial tortuosity is often not symptomatic, but if there is severe tortuosity, various symptoms may occur, depending on the localization. In the literature, many factors have been reported as causing tortuosity in the vertebral arteries. In this case report, considering the age of our patient, we propose that, in addition to these previously reported reasons, congenital factors may also contribute to this situation. Case presentation We present a case of a 19-year-old Turkish patient with a tortuous vertebral artery causing pain and tingling in the right shoulder and neck. Magnetic resonance imaging revealed vertebral foramen enlargement thought to be secondary to a loop formation in the vertebral artery. The diagnosis was confirmed by magnetic resonance angiography. Conclusions There are many causes of cervical radiculopathy. Arterial tortuosity, a rare cause of radiculopathy, should be considered as a differential diagnosis. Consideration of the existence of this variation is of great importance in preventing possible dangerous complications during surgery.
    Keywords Vertebral artery loop formation ; Tortuous vertebral artery ; Widening of vertebral foramen ; VALF ; Medicine ; R
    Subject code 610
    Language English
    Publishing date 2020-09-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Teaching NeuroImages: Striatocapsular infarct presumed due to intracranial lipoma.

    Besir, Fahri Halit / Onbas, Omer

    Neurology

    2015  Volume 84, Issue 2, Page(s) e11

    MeSH term(s) Adult ; Brain Infarction/diagnosis ; Brain Infarction/etiology ; Brain Neoplasms/complications ; Brain Neoplasms/diagnosis ; Corpus Striatum ; Female ; Humans ; Lipoma/complications ; Lipoma/diagnosis ; Magnetic Resonance Imaging
    Language English
    Publishing date 2015-01-13
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 207147-2
    ISSN 1526-632X ; 0028-3878
    ISSN (online) 1526-632X
    ISSN 0028-3878
    DOI 10.1212/WNL.0000000000001121
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  7. Article ; Online: Comment on "anatomical variations in branching pattern of arcus aorta: 64-slice CTA appearance (Ergun et al. Surg Radiol Anat doi: 10.1007/s00276-012-1063-3)".

    Besir, Fahri Halit / Ozel, Mehmet Ali / Onbas, Omer

    Surgical and radiologic anatomy : SRA

    2014  Volume 36, Issue 10, Page(s) 1105–1106

    MeSH term(s) Aorta, Thoracic/anatomy & histology ; Aorta, Thoracic/diagnostic imaging ; Female ; Humans ; Image Interpretation, Computer-Assisted ; Male ; Multidetector Computed Tomography/methods
    Language English
    Publishing date 2014-03-27
    Publishing country Germany
    Document type Letter ; Comment
    ZDB-ID 632839-8
    ISSN 1279-8517 ; 0930-312X ; 0930-1038
    ISSN (online) 1279-8517
    ISSN 0930-312X ; 0930-1038
    DOI 10.1007/s00276-014-1288-4
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  8. Article ; Online: Prevalence of the Accessory Cardiac Bronchus on Multidetector Computed Tomography: Evaluation and Proposed Classification.

    Unlu, Elif Nisa / Yilmaz Aydin, Leyla / Bakirci, Sinan / Onbas, Omer

    Journal of thoracic imaging

    2016  Volume 31, Issue 5, Page(s) 312–317

    Abstract: Purpose: Accessory cardiac bronchus (ACB) is a very rare congenital anomaly and may cause some clinical complications, such as recurrent episodes of both infection and hemoptysis. The purpose of this study was to assess the multidetector computed ... ...

    Abstract Purpose: Accessory cardiac bronchus (ACB) is a very rare congenital anomaly and may cause some clinical complications, such as recurrent episodes of both infection and hemoptysis. The purpose of this study was to assess the multidetector computed tomography (MDCT) characteristics of ACB and to classify this anomaly according to the MDCT aspects.
    Materials and methods: The routine thoracic CT scans from 5790 patients were evaluated retrospectively. The prevalence, location, length, diameter, division angle, distance from the carina, and the type of ACB were evaluated.
    Results: A total of 12 ACBs were identified, with a prevalence of 0.2%. All ACBs originated from the intermediate bronchus. The median largest diameter of the ACBs was 7.75 mm (range: 5.8 to 10.30 mm), the median length was 12.1 mm (range: 8.6 to 35 mm), the median division angle was 61 degrees (range: 42 to 93 degrees), and the median distance from the carina was 16.95 mm (range: 5.7 to 22.20 mm). Six cases (50%) had a blind extremity (type 1: diverticulum or stump type), 3 cases (25%) had a mutiloculated cystic change at the end (type 2: cystic type), and 3 cases (25%) had a ventilated lobulus demarcated by an anomalous fissure (type 3: ventilated type).
    Conclusions: ACBs can be classified into 3 types according to their MDCT features. Recognition of ACB is important, as it is associated with clinical complications and is also salient in trauma cases.
    MeSH term(s) Adolescent ; Adult ; Aged ; Bronchi/abnormalities ; Bronchi/diagnostic imaging ; Bronchial Diseases/diagnostic imaging ; Bronchial Diseases/epidemiology ; Female ; Humans ; Male ; Middle Aged ; Multidetector Computed Tomography/methods ; Prevalence ; Retrospective Studies ; Young Adult
    Language English
    Publishing date 2016-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 632900-7
    ISSN 1536-0237 ; 0883-5993
    ISSN (online) 1536-0237
    ISSN 0883-5993
    DOI 10.1097/RTI.0000000000000229
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  9. Article ; Online: Accessory occipital suture mimicking fracture in head trauma.

    Naldemir, Ibrahim F / Guclu, Derya / Baki Altınsoy, H / Berk Canga, H / Onbas, Omer

    The American journal of emergency medicine

    2017  Volume 36, Issue 3, Page(s) 530.e7–530.e8

    Abstract: The occipital bone is a complex structure due to its anatomy and accessory sutures. Fracture - accessory suture differential diagnosis should be performed carefully in patients with a history of head trauma [4]. In this case report we wanted to emphasize ...

    Abstract The occipital bone is a complex structure due to its anatomy and accessory sutures. Fracture - accessory suture differential diagnosis should be performed carefully in patients with a history of head trauma [4]. In this case report we wanted to emphasize that accessory sutures can be difficult to diagnose in patients with head trauma. We also specified the points to be considered in the suture - fracture differentional diagnosis. A bilateral, symmetrical fissure line was observed in the occipital bone basal part of the patient who was admitted to our emergency department due to head trauma. The patient was followed up with accessory suture and then discharged after paying attention to important points in the differential diagnosis.
    MeSH term(s) Cranial Sutures/diagnostic imaging ; Craniocerebral Trauma/diagnostic imaging ; Diagnosis, Differential ; Female ; Humans ; Infant ; Occipital Bone/abnormalities ; Occipital Bone/diagnostic imaging ; Occipital Bone/injuries ; Skull Fractures/diagnostic imaging ; Tomography, X-Ray Computed
    Language English
    Publishing date 2017-12-21
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 605890-5
    ISSN 1532-8171 ; 0735-6757
    ISSN (online) 1532-8171
    ISSN 0735-6757
    DOI 10.1016/j.ajem.2017.12.046
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  10. Article: Central pontine myelinolysis central pontine myelinolysis manifesting with massive myoclonus.

    Tan, Hüseyin / Onbaş, Omer

    Pediatric neurology

    2004  Volume 31, Issue 1, Page(s) 64–66

    Abstract: Central pontine myelinolysis is a rare neurologic disorder defined by symmetric demyelination in the central base of the pons. It usually manifests with neurologic signs such as impaired consciousness, ataxia, spastic quadriparesis, pseudobulbar signs, ... ...

    Abstract Central pontine myelinolysis is a rare neurologic disorder defined by symmetric demyelination in the central base of the pons. It usually manifests with neurologic signs such as impaired consciousness, ataxia, spastic quadriparesis, pseudobulbar signs, and the locked-in syndrome which is related to a disconnection syndrome at the pontine level. We report a 17-month-old patient with kwashiorkor and hyponatremia who developed acute massive myoclonus. Magnetic resonance imaging revealed a central pontine lesion. Central pontine myelinolysis is rare in infants, with only a few cases reported in the literature so far. This report presents the first infantile case of central pontine myelinolysis manifesting with massive myoclonus.
    MeSH term(s) Humans ; Hyponatremia/complications ; Infant ; Kwashiorkor/complications ; Magnetic Resonance Imaging ; Male ; Myelinolysis, Central Pontine/complications ; Myelinolysis, Central Pontine/pathology ; Myoclonus/etiology ; Myoclonus/pathology
    Language English
    Publishing date 2004-07
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 639164-3
    ISSN 1873-5150 ; 0887-8994
    ISSN (online) 1873-5150
    ISSN 0887-8994
    DOI 10.1016/j.pediatrneurol.2004.01.001
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