Pilocytic astrocytoma

Pilocytic astrocytoma or juvenile pilocytic astrocytoma or cystic cerebellar astrocytoma is a brain tumor that occurs more often in children and young adults. 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. The neoplasms are associated with the formation of a single cyst(s), and can become very large.
Pilocytic astrocytomas are often cystic, and, if solid, tend to be well-circumscribed. It is characteristically easily seen on CT scans and MRI.


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