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An ependymoma is a tumor that arises from the ependyma, a tissue of the central nervous system. Usually, in pediatric cases the location is intracranial, while in adults it is spinal. The common location of intracranial ependymomas is the floor of the fourth ventricle. Rarely, ependymomas can occur in the pelvic cavity.
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]
The first tumor classified as grade I is called pilocytic astrocytoma and it is most commonly observed in children rather than adults. [2] The next tumor is never common in the Dns called diffuse astrocytoma and it is considered a grade II, they are benign, or noncancerous, but can become malignant, meaning cancerous, as the tumor progresses.
Pancreatic islet cell tumors are today the major cause of death in persons with MEN-1. Tumors occur in 60-80% of persons with MEN-1 and they are usually multicentric. Multiple adenomas or diffuse islet cell hyperplasia commonly occurs. About 30% of tumors are malignant and have local or distant metastases. [5]
Multiple endocrine neoplasia (abbreviated MEN) is a condition which encompasses several distinct syndromes featuring tumors of endocrine glands, each with its own characteristic pattern. In some cases, the tumors are malignant, in others, benign. Benign or malignant tumors of nonendocrine tissues occur as components of some of these tumor ...
Menopause can be broken down into three stages, though Tang notes that menopause and perimenopause are typically grouped together. Perimenopause: Symptoms like hot flashes and mood swings start as ...
Carcinoid syndrome is a paraneoplastic syndrome comprising the signs and symptoms that occur secondary to neuroendocrine tumors (formerly known as carcinoid tumors). [1] The syndrome is caused by neuroendocrine tumors most often found in the gut releasing biologically active substances into the blood causing symptoms such as flushing and diarrhea, and less frequently, heart failure, vomiting ...
Simian virus (SV) 40 has been linked in studies to the development of choroid plexus tumors (CPTs). [6] The BK and JC viruses have also been linked to the problem. [7] In people with choroid plexus tumors, complexes formed by the big T antigen and the tumor suppressor proteins p53 and pRb have been shown to develop. [7]
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