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Pachygyria, lissencephaly (smooth brain), and polymicrogyria (multiple small gyri) are all the results of abnormal cell migration. The abnormal migration is typically associated with a disorganized cellular architecture, failure to form six layers of cortical neurons (a four-layer cortex is common), and functional problems.
A central nervous system tumor (CNS tumor) is an abnormal growth of cells from the tissues of the brain or spinal cord. [1] CNS tumor is a generic term encompassing over 120 distinct tumor types. [2] Common symptoms of CNS tumors include vomiting, headache, changes in vision, nausea, and seizures. [3]
Macrocephaly is a condition in which circumference of the human head is abnormally large. [1] It may be pathological or harmless, and can be a familial genetic characteristic. . People diagnosed with macrocephaly will receive further medical tests to determine whether the syndrome is accompanied by particular disorde
This is an accepted version of this page This is the latest accepted revision, reviewed on 10 January 2025. Neoplasm in the brain Medical condition Brain tumor Other names Intracranial neoplasm, brain tumour, brain cancer Brain metastasis in the right cerebral hemisphere from lung cancer, shown on magnetic resonance imaging Specialty Neurosurgery, neuro-oncology Symptoms Vary depending on the ...
The cysts and cavities (cystic brain lesions) are more likely to be the result of destructive (encephaloclastic) cause, but can also be from abnormal development (malformative), direct damage, inflammation, or hemorrhage. [5] The cysts and cavities cause a wide range of physiological, physical, and neurological symptoms. [6]
About 98% of cases of acromegaly are due to the overproduction of growth hormone by a benign tumor of the pituitary gland called an adenoma. [17] These tumors produce excessive growth hormone and compress surrounding brain tissues as they grow larger. In some cases, they may compress the optic nerves. Expansion of the tumor may cause headaches ...
Classification of brainstem gliomas by MRI appearance. Histopathology of a brainstem glioma. A brainstem glioma is a cancerous glioma tumor in the brainstem.Around 75% are diagnosed in children and young adults under the age of twenty, but have been known to affect older adults as well. [1]
Up to 50% of the causes of primary hydrocephalus are genetic. [21] Congenital hydrocephalus is defined by the presence of excess CSF at birth. It occurs due to a combination of factors, with genetic causes prior to birth, meaning the fetus developed hydrocephalus in utero during fetal development. The most common cause of congenital ...
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