المؤلفون: Michiharu Tanabe, Hisayo Okamoto, Satoshi Matsumoto, Kazunori Shirakashi, Takashi Watanabe

المصدر: Neurologia medico-chirurgica. 39:358-361

مصطلحات موضوعية: Adult, Male, Condyle, Clivus, Fracture Fixation, medicine, Humans, Foramen Magnum, Fractures, Closed, Cranial Nerve Injuries, Foramen magnum, Palsy, business.industry, Avulsion fracture, Cranial nerves, Accidents, Traffic, Anatomy, medicine.disease, Occipital condyle, Radiography, Treatment Outcome, medicine.anatomical_structure, Cranial Fossa, Posterior, Cranial Nerve Injury, Cervical Vertebrae, Surgery, Neurology (clinical), business

الوصف: A 38-year-old male presented with an avulsion fracture of the anterior half of the foramen magnum due to a traffic accident. He had palsy of the bilateral VI, left IX, and left X cranial nerves, weakness of his left upper extremity, and crossed sensory loss. He was treated conservatively and placed in a halo brace for 16 weeks. After immobilization, swallowing, hoarseness, and left upper extremity weakness improved. Hyperextension with a rotatory component probably resulted in strain in the tectorial membrane and alar ligaments, resulting in avulsion fracture at the sites of attachment, the bilateral occipital condyles and the inferior portion of the clivus. Conservative treatment is probably optimum even for this unusual and severe type of occipital condyle fracture.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c255565e9d7ed91daa444340e116f93eTest
https://doi.org/10.2176/nmc.39.358Test

المؤلفون: Hideyuki Akiyama, Norihiko Tamaki, Takeshi Kondoh, Tatsuya Nagashima

المصدر: Neurologia medico-chirurgica. 39:539-543

مصطلحات موضوعية: Decompression, medicine.medical_treatment, Radiography, Joint Dislocations, Cruciate ligament, Odontoid Process, Humans, Medicine, Cyst, Foramen magnum, business.industry, Laminectomy, Capsule, Anatomy, Middle Aged, Decompression, Surgical, medicine.disease, Magnetic Resonance Imaging, body regions, Spinal Fusion, Treatment Outcome, medicine.anatomical_structure, Atlanto-Axial Joint, Synovial Cell, Synovial Cyst, Female, Surgery, Neurology (clinical), business, Spinal Cord Compression

الوصف: A 51-year-old female presented with a rare case of synovial cyst at the cruciate ligament of the odontoid process associated with atlanto-axial dislocation, manifesting as a history of headache and numbness in her left extremities for 5 months, and progressive motor weakness of her left leg. Neuroimaging studies revealed a small cystic lesion behind the dens, which severely compressed the upper cervical cord, and atlanto-axial dislocation. The cyst was successfully removed via the transcondylar approach. C-1 laminectomy and foramen magnum decompression were also performed. Posterior craniocervical fusion was carried out to stabilize the atlanto-axial dislocation. The cyst contained mucinous material. Histological examination detected synovial cells lining the fibrocartilaginous capsule. Synovial cysts of this region do not have typical symptoms or characteristic radiographic features. Careful preoperative evaluation of the symptoms and a less invasive strategy for removal of the cyst are recommended.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc2d1822531b63efd25ab133030ae902Test
https://doi.org/10.2176/nmc.39.539Test

المؤلفون: Kiyotaka Fujii, Hiroshi Takagi, Kuniaki Nakahara, Shinichi Kan, Yoshio Miyasaka

المصدر: Neurologia medico-chirurgica. 43:80-81

مصطلحات موضوعية: musculoskeletal diseases, Foramen magnum, medicine.medical_specialty, business.industry, Radiography, Occipital bone, Poison control, medicine.disease, Head trauma, Surgery, medicine.anatomical_structure, Skull fracture, Cranial sutures, medicine, Accessory cranial suture, Neurology (clinical), business

الوصف: A one-year, 9-month-old boy presented with pediatric head trauma associated with unusual accessory cranial sutures. Radiography demonstrated unusual bilateral longitudinal linear bone defects extending from the foramen magnum to the mendosal sutures, and bilateral transverse linear bone defects around the foramen magnum. No swelling or soreness were found in the occipital area, and there was no past history of head trauma. Therefore, the bone defects were considered to be accessory cranial sutures. Complex developmental patterns of the occipital bone and the considerable normal variation of sutures may simulate fractures around the foramen magnum. The present case of accessory cranial sutures is another example.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::4552bdd1c5d0018f8f34898fe8c13724Test
https://doi.org/10.2176/nmc.43.80Test

المؤلفون: Kazuhiko Kawano, Akira Hakuba, Yasuhiko Mishima, Shuro Nishimura

المصدر: Neurologia medico-chirurgica. 22:563-576

مصطلحات موضوعية: Adult, Male, musculoskeletal diseases, medicine.medical_specialty, Foramen magnum, Spinal Neoplasms, Adolescent, business.industry, Skull Neoplasms, Middle Aged, Surgery, Radiography, medicine.anatomical_structure, Humans, Medicine, Female, Foramen Magnum, Neurology (clinical), Neurosurgery, Presentation (obstetrics), Differential diagnosis, business, Surgical treatment, Aged

الوصف: Tumors of the foramen magnum are rare and the incidence is between 1.6% and 2.4% of all spinal tumors; therefore the personal experiences of one neurosurgeon with this type of tumor are necessarily limited. This unfamiliarity, combined with the curious presentation of some of the lesions due to the complex anatomy of this region, has made the diagnosis of foramen magnum tumors difficult. Unless this is kept in mind, one might fail to consider these lesions in the differential diagnosis, causing a delay in appropriate treatment until permanent damage results. The purpose of this paper is to describe the symptomatology and diagnosis, as well as the surgical treatment, of 21 cases of foramen magnum tumor encountered at our clinic during the last 10 years.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c385c3e1b8e0a088bf570a4b3d9b87f2Test
https://doi.org/10.2176/nmc.22.563Test

المؤلفون: Itoh Y, Takahashi S

المصدر: Neurologia medico-chirurgica. 29:758-761

مصطلحات موضوعية: Foramen magnum, medicine.medical_specialty, Fibroblastic meningioma, Fossa, biology, business.industry, Ruptured aneurysms, Middle Aged, medicine.disease, biology.organism_classification, Head trauma, Radiography, Meningioma, Skull, Hematoma, Subdural, medicine.anatomical_structure, Hematoma, Meningeal Neoplasms, Humans, Medicine, Female, Surgery, Neurology (clinical), Radiology, business

الوصف: The authors report the incidental discovery of a meningioma during surgery for an acute infratentorial subdural hematoma. The patient was a 46-year-old female admitted for severe head trauma. A plain skull X-ray showed a sharp linear fracture in the left posterior region, extending from the parietal area to the foramen magnum. An initial computed tomographic scan demonstrated a high-density intracranial mass in the left posterior fossa. Three hours after onset, the patient underwent emergency craniectomy and a subdural hematoma weighing 30 g was aspirated. During this procedure, an infratentorial tumor 30 mm in diameter was found to be attached to the dura and was totally removed. The tumor was a fibroblastic meningioma. The patient's postoperative course was uneventful. Most incidentally discovered meningiomas have been found in patients with ruptured aneurysms or chronic subdural hematomas. This is the first reported case in which the tumor was found in association with an acute infratentorial subdural hematoma.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e6f9b2e81e3a9ea52abfed3e1f7054b4Test
https://doi.org/10.2176/nmc.29.758Test