Learning Objectives: After reading this article, the participant should be able to: 1. Recall the incidence and differential diagnosis offoramen magnum meningiomas. 2. Describe the clinical presentation and the pre-operative evaluation ofpatients with foramen magnum meningiomas, including the radiologic features and the different types offoramen magnum meningiomas. 3. Explain the pre-operative ...

A case of a Chiari malformation with an extraordinarily thick occipital bone is described. The thick occipital bone might make the posterior fossa narrow with consequent herniation of the cerebellar tonsils to the foramen magnum and formation of a syrinx. At dural plasty, well-developed marginal and occipital sinuses should be deliberately handled with the preservation of normal venous drainage...

Intradural metastatic tumors of the foramen magnum region are extremely rare tumors. We report a 73-year-old patient that presented with right hemiparesis and a recent history of prostate biopsy for an enlarged prostate. Imaging revealed an anterolateral intradural foramen magnum mass with compression of the medulla. A right far lateral approach with condyle preservation was used to resect the ...

BACKGROUND Achondroplasia is a relatively frequent genetic disorder that may lead to limb weakness, motor-mental retardation, hydrocephaly, and respiratory disorders. In this pathology, foramen magnum stenosis and accompanying disorders like respiratory depression is well documented. CASE PRESENTATION A 2.5 year-old child with the diagnosis of achondroplasia admitted to our clinic with severe...

Aim: To provide basic osteometric data of the following diameters anteroposterior, transverse, right and left oblique, and shape of human foramen magnum in Indian skulls and CT images. A total of 100 adult human skulls from the Department of Anatomy and 100 CT Brain images taken in the Department of Radiology, Mahatma Gandhi Medical College and RI, Pondicherry were evaluated. Methodology: Maxim...

Atlantooccipital fusion is complete or partial congenital fusion of the atlas to the base of occiput. Basilar impression may complicate the clinical picture with the reduction of the vertical height of atlas causing odontoid or other bony structures project into foramen magnum and medulla oblongata. This results in narrowing of the foramen magnum and leads to neural compression. Authors present...

Craniosynostosis associated with Chiari malformation (CM) is usually found in infants with an underdeveloped posterior fossa. We here present a case of adult craniosynostosis, CM, and symptomatic syringomyelia caused by the protrusion of the posterior rim of the foramen magnum without a tight posterior fossa. A 22-year-old woman with an abnormal head shape and forearm hypesthesia was given a di...

Purpose. The structural integrity of foramen magnum is usually preserved in fire accidents and explosions due to its resistant nature and secluded anatomical position and this study attempts to determine its sexing potential. Methods. The sagittal and transverse diameters and area of foramen magnum of seventy-two skulls (41 male and 31 female) from south Indian population were measured. The ana...

Schwannomas involving the foramen magnum commonly originate from the lower cranial nerves, but they are rarely found arising from the first cervical root. To date, very few cases have been described in the literature. The majority involve either the intradural or extradural compartment but not both. We report the second case of a dumbbell-shaped schwannoma arising from the first cervical root. ...

Twenty-five patients with tumors in the region of foramen magnum confirmed by pathology and surgery are presented. There were 19 males and 6 females. The ages ranged from 4-56 years. According to the clinical findings, the authors suggest that if a patient has occipitocervical pain or headache accompanied with neurological signs of medulla, cervical spinal cord or lower cranial nerves, tumors i...