juvenile astrocytoma - definição. O que é juvenile astrocytoma. Significado, conceito
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O que (quem) é juvenile astrocytoma - definição

ASTROCYTOMA THAT IS CHARACTERIZED BY CELLS THAT LOOK LIKE FIBERS WHEN VIEWED UNDER A MICROSCOPE AND IS LOCATED IN THE BRAIN
Pilocytic; Benign astrocytoma; Juvenile pilocytic astrocytoma; Juvenile Pilocytic Astrocytoma; Pilocyte
  • Pilocytic astrocytoma in the hypothalamic region
  • T1-weighted coronal MRI image postcontrast showing heterogeneous contrast enhancement within the presumed tectal plate glioma
  • Axial non-contrast CT in a nine-year-old girl showing a slightly hypodense mass in the tectum of the brainstem, compressing the aqueduct of Sylvius and causing obstructive hydrocephalus
  • Sagittal T1-weighted MRI showing a well-circumscribed hypointense mass in the tectum (presumably a tectal plate glioma).  These lesions are a distinct subset of pilocytic astrocytoma which present with hydrocephalus typically in 6 to 10 year-olds and are rarely progressive lesions. When imaging is characteristic, a biopsy is usually not performed because of the risks to adjacent structures, often shunting to relieve intracranial pressure is the only treatment required.

Pilocytic astrocytoma         
Pilocytic astrocytoma (and its variant pilomyxoid astrocytoma) is a brain tumor that occurs most commonly in children and young adults (in the first 20 years of life). They usually arise in the cerebellum, near the brainstem, in the hypothalamic region, or the optic chiasm, but they may occur in any area where astrocytes are present, including the cerebral hemispheres and the spinal cord.
Fibrillary astrocytoma         
ASTROCYTOMA THAT IS CHARACTERIZED AS A LOW GRADE ASTROCYTOMA AND HAS MATERIAL BASIS IN NEOPLASTIC ASTROCYTES
Low grade astrocytoma; Lowgraded astrocytoma; Lowgrade astrocytoma; Low-grade astrocytoma
Fibrillary astrocytomas are a group of primary slow-growing brain tumors that typically occur in adults between the ages of 20 and 50.
Astrocytoma         
TYPE OF CANCER OF THE BRAIN ORIGINATING IN A PARTICULAR KIND OF GLIAL CELLS, STAR-SHAPED BRAIN CELLS IN THE CEREBRUM CALLED ASTROCYTES
Astrocytomas; Malignant astrocytoma
Astrocytomas are a type of brain tumor. They originate in a particular kind of glial cells, star-shaped brain cells in the cerebrum called astrocytes.

Wikipédia

Pilocytic astrocytoma

Pilocytic astrocytoma (and its variant pilomyxoid astrocytoma) is a brain tumor that occurs most commonly in children and young adults (in the first 20 years of life). They usually arise in the cerebellum, near the brainstem, in the hypothalamic region, or the optic chiasm, but they may occur in any area where astrocytes are present, including the cerebral hemispheres and the spinal cord. These tumors are usually slow growing and benign, corresponding to WHO malignancy grade 1.