المؤلفون: Kazuhiro Tsuchiya, Ryota Kogue, Maki Umino, Hajime Sakuma, Masayuki Maeda

المصدر: Neuroradiology. 61:1199-1202

مصطلحات موضوعية: Adult, Male, Accessory nerve, Vertebral artery, Contrast Media, Gadolinium, Inversion recovery, Fluid-attenuated inversion recovery, Sensitivity and Specificity, 030218 nuclear medicine & medical imaging, Fast field echo, Lesion, 03 medical and health sciences, Accessory Nerve, Imaging, Three-Dimensional, 0302 clinical medicine, medicine.artery, medicine, Humans, Radiology, Nuclear Medicine and imaging, Foramen Magnum, Vertebral Artery, Aged, Retrospective Studies, Neuroradiology, Incidental Findings, medicine.diagnostic_test, Brain Neoplasms, Echo-Planar Imaging, business.industry, Magnetic resonance imaging, Middle Aged, Image Enhancement, Cerebral Angiography, Female, Neurology (clinical), medicine.symptom, Cardiology and Cardiovascular Medicine, business, Nuclear medicine, 030217 neurology & neurosurgery

الوصف: Previous reports have identified a small, benign, high-signal lesion (HSL) posterior to the intracranial vertebral artery and associated with the ipsilateral spinal accessory nerve (SAN) using 3D fluid-attenuated inversion recovery (3D FLAIR) imaging as an emerging new entity. To elucidate the relationship between HSLs and SAN, 76 patients with 86 HSLs were evaluated using 3D FLAIR and 3D balanced fast-field echo (3D bFFE imaging). All HSLs showed contact with ipsilateral SAN on both the sequences. 3D bFFE imaging clearly distinguished between the two structures unlike 3D FLAIR. Moreover, SAN was surrounded by HSLs on 3D bFFE images, which may be a characteristic of this entity.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e73d0a0e9262502c915805ad5d1375dTest
https://doi.org/10.1007/s00234-019-02270-5Test

المؤلفون: Masayuki Maeda, Kazuhiro Tsuchiya, Maki Umino, Ryota Kogue, Hajime Sakuma

المصدر: Neuroradiology. 60(6)

مصطلحات موضوعية: Adult, Male, medicine.medical_specialty, Accessory nerve, Adolescent, Vertebral artery, Fluid-attenuated inversion recovery, 030218 nuclear medicine & medical imaging, Lesion, 03 medical and health sciences, 0302 clinical medicine, Imaging, Three-Dimensional, medicine.artery, Image Interpretation, Computer-Assisted, Medicine, Humans, Radiology, Nuclear Medicine and imaging, Foramen Magnum, Child, Vertebral Artery, Neuroradiology, Aged, Retrospective Studies, Foramen magnum, Brain Diseases, Incidental Findings, medicine.diagnostic_test, business.industry, Magnetic resonance imaging, Middle Aged, Magnetic Resonance Imaging, medicine.anatomical_structure, Female, Neurology (clinical), Neurosurgery, Radiology, medicine.symptom, Cardiology and Cardiovascular Medicine, business, 030217 neurology & neurosurgery

الوصف: A small, benign high-signal lesion (HSL) posterior to the intracranial vertebral artery (VA) at the foramen magnum is a new entity revealed by a 3D FLAIR sequence. However, this entity has not been sufficiently investigated. We aimed to investigate the MR imaging findings of HSLs posterior to the intracranial VA that were incidentally detected by 3D FLAIR. We retrospectively evaluated 3717 patients using a 3-T MR unit. HSLs on 3D FLAIR were assessed for prevalence, size, contact with the spinal accessory nerve (SAN), and size changes on follow-up images. Of 3717 patients, 127 (3.4%) (58 males and 69 females; age, 60.0 ± 18.9 years) showed 142 HSLs posterior to the intracranial VA. In total, 114 patients (89.8%) had a single lesion, whereas 13 patients (10.2%) had multiple lesions. The mean lesion size was 3.8 ± 1.6 mm. All HSLs showed contact with the ipsilateral SAN. Of 69 HSLs that were imaged during follow-up, the size was stable in 91.3% and increased in 8.7%. HSLs posterior to the intracranial VA were incidentally detected in 3.4% of patients by 3D FLAIR. Our results indicated a possible association between HSLs and SAN. These lesions appear to be benign in etiology and thus would not require any surgical intervention without continuous growth in a short period or relevant signs and symptoms.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ced8a9e756d45594db26e55cf77b3254Test
https://pubmed.ncbi.nlm.nih.gov/29725694Test

المؤلفون: Akira Uchino

المصدر: Neuroradiology. 57(3)

مصطلحات موضوعية: Models, Anatomic, Foramen magnum, business.industry, Vertebral artery, Angiography, Anatomy, Cerebral Arteries, Posterior inferior cerebellar artery, medicine.anatomical_structure, medicine.artery, Cerebellum, medicine, Cervical Vertebrae, Humans, Radiology, Nuclear Medicine and imaging, Neurology (clinical), Cardiology and Cardiovascular Medicine, business, Pica (typography), Vertebral Artery, Neuroradiology

الوصف: Dear Sir, I read with great interest the article by Wakao et al. [1]. With this study, the authors confirm with 3D CTA the vertebral artery variations at the C1-C2 level that we described as diagnosed by MRA [2]. Nevertheless, we wish to draw the attention of your readers about a possible misinterpretation of the anatomy in figures 1C and 5. The authors state that in these figures, the posterior inferior cerebellar artery (PICA) arises from C1/2. However, my interpretation of the images of both figures is that the PICA does not arise from level C1/2 but is arising from the foramen magnum level, i.e., above C1. In true C1/2 origin of the PICA, the origin of this vessel has to be clearly under the level of C1 (Fig. 1) [2]. It might be that in the patients represented in figures 1C and 5, the origin of the PICA is at level C1/2 but this is not clear from the images shown. The authors might show in a reply to this letter a new figure with a true C1/2 origin of PICA.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7681f92d1d24ebdd7509a09c9829d9a0Test
https://pubmed.ncbi.nlm.nih.gov/25359265Test

المؤلفون: Jose A. Menendez, Anil Nanda, M. A. Day, Mustafa K. Baskaya

المصدر: Neuroradiology. 43:246-248

مصطلحات موضوعية: Male, medicine.medical_specialty, Vertebral artery, Condyle, Central nervous system disease, Fatal Outcome, medicine.artery, medicine, Craniocerebral Trauma, Humans, Vasospasm, Intracranial, Radiology, Nuclear Medicine and imaging, Fractures, Closed, Vertebral Artery, Neuroradiology, Foramen magnum, business.industry, Vasospasm, Middle Aged, musculoskeletal system, medicine.disease, nervous system diseases, Surgery, Hydrocephalus, medicine.anatomical_structure, Occipital Bone, Accidental Falls, Neurology (clinical), Neurosurgery, Cardiology and Cardiovascular Medicine, business

الوصف: Occipital condylar fractures (OCF) are rare and have a high mortality rate. We report a patient with OCF who presented with acute hydrocephalus and died from diffuse vasospasm secondary to vertebral artery injury. A 45-year-old man fell 20 feet from a deer stand and landed on his head. CT showed a type III OCF continuing to the anterior rim of the foramen magnum on the left, with a bone fragment pushing into the medulla, causing hydrocephalus. The patient was stabilized, and a four-vessel arteriogram showed diffuse vasospasm with complete occlusion of the left vertebral artery at the level of the OCF. To our knowledge, this is the first documented case of the conjunction of OCF, hydrocephalus, and vasospasm.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3f347842f0eda79c72fdd6530fda94dTest
https://doi.org/10.1007/s002340000441Test

المؤلفون: Sien-Tsong Chen, C. J. Chen

المصدر: Neuroradiology. 39(5)

مصطلحات موضوعية: medicine.medical_specialty, Medullary cavity, Adolescent, Aneurysm, Ruptured, Aneurysm, medicine.artery, Cerebellum, medicine, Humans, Radiology, Nuclear Medicine and imaging, cardiovascular diseases, Neuroradiology, Foramen magnum, medicine.diagnostic_test, business.industry, Brain, Anatomy, Subarachnoid Hemorrhage, medicine.disease, Hydrocephalus, Cerebral Angiography, Posterior inferior cerebellar artery, medicine.anatomical_structure, Angiography, cardiovascular system, Female, Neurology (clinical), Radiology, Cardiology and Cardiovascular Medicine, business, Tomography, X-Ray Computed, Cerebral angiography

الوصف: An unusual aneurysm arising from an extracranial lateral medullary segment of the posterior inferior cerebellar artery (PICA) is reported. The origin of the PICA was also extracranial, 10 mm below the foramen magnum. The aneurysm was not seen on three-vessel angiography. The literature is reviewed with regard to the clinical and radiological features of such aneurysms. Occipital and nuchal headache with an altered level of consciousness, intraventricular haemorrhage, and hydrocephalus are suggestive of such aneurysm. The need for four-vessel angiography is again stressed.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce94826a9bc9d2a8315cc00ac4740072Test
https://pubmed.ncbi.nlm.nih.gov/9189879Test

المؤلفون: E. Lundorf, P. Sørensen

المصدر: Neuroradiology. 30:359-359

مصطلحات موضوعية: medicine.medical_specialty, Neurology, Radiography, Vertebral artery, Diagnosis, Differential, Aneurysm, medicine.artery, medicine, Humans, Radiology, Nuclear Medicine and imaging, Foramen Magnum, Vertebral Artery, Neuroradiology, Foramen magnum, Brain Neoplasms, business.industry, Intracranial Aneurysm, Middle Aged, medicine.disease, medicine.anatomical_structure, Female, Neurology (clinical), Radiology, Neurosurgery, Cardiology and Cardiovascular Medicine, business

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::019a3135c7ca36a955b5fba346bd79f9Test
https://doi.org/10.1007/bf00328191Test