Q: What is the clinical (i.e. symptoms) differential diagnosis for patients who present with foramen magnum meningiomas? show answer A: multiple sclerosis, amyotrophic lateral sclerosis, syringomyelia, cervical spondylosis, tumours of the upper cord.

At the foramen magnum anteriorly, there is an extra-axial mass with low signal intensity on T1 weighted images and mildly hyperintense on T2/FLAIR weighted images. The mass reveals homogeneous enhancement on post-contrast injection with dural tail. There is significant mass effect and compression of the medullo-cervical region posteriorly.

Right anterolateral foramen magnum mass compresses the cervico-medullary junction and upper cervical cord and mostly displaces the right vertebral artery towards the midline. Exhibits iso …

MRI shows intradural meningioma in the right side of foramen magnum, with 2.3×1.3 cm in size Neurosurgeon has suggested that the further treatment should be performed with “gamma knife” radiosurgery in University Hospital Center Zagreb.

2024年4月6日 · A 55-year-old woman was found to have a right foramen magnum lesion, most likely a meningioma, after undergoing a magnetic resonance imaging (MRI) for new-onset vertigo, later attributed to benign paroxysmal positional vertigo. Serial MRIs studies demonstrated growth at a rate of 1 mm per year ( Figure 11.54.1 ).

2008年6月4日 · Magnetic resonance imaging is the modality of choice for defining tumors of the foramen magnum because it provides high-resolution images of soft-tissue anatomy that is not …

2024年4月6日 · Case description A 63-year-old woman presented with a worsening headache and was found to have a 4-cm petroclival meningioma centered on the lower third of the clivus with compression of the brainstem and a 360-degree encasement of the right vertebral artery ( Figure 11.55.1 ).

Foramen magnum meningiomas are classified according to their compartment of development, their dural insertion, and their relation to the vertebral artery. The relation to the vertebral artery permits to anticipate the displacement of the lower cranial nerves.

In this article, we present the long-term outcomes of patients with meningiomas involving the foramen magnum, treated with both primary and adjuvant radiosurgery. Between 1991 and 2005, 222 patients underwent Gamma Knife radiosurgery (GKRS) for posterior fossa meningiomas at the University of Virginia.

Well-defined broad-based extra-dural mass at the foramen magnum lateralized to the right, compressing and displacing the bulbomedullary junction to the left. It elicits an isosignal to the spinal cord on T1, high signal on T2 with vivid homogeneous enhancement on postcontrast sequences with a dural tail sign.