title: Pilomyxoid astrocytoma in cerebellum.
abstract: Pilomyxoid astrocytoma is a new identified variant type of pilocytic astrocytoma, and typically locates in the hypothalamic and chiasmatic region. Herein, we reported a nine-year-old boy with pilomyxoid astrocytoma in the cerebellum. MRI scanning showed a tumor involved the cerebellar vermis, tonsil, the forth ventricle and brainstem. It was homogeneous isointensity on T1WI, relative hyper-intensity on T2WI, hyper-intensity on fluid attenuated inversion recovery (FLAIR) images, and uniform enhancement on contrast T1WI. The tumor was sub-totally removed and was proved histologically to be pilomyxoid astrocytoma. Follow-up at the 5th month, MRI showed the residual tumor enlarged at the brainstem. The patient survived 10 months after the operation, and finally died of respiration failure resulting from brainstem dysfunction.
authors: Department of Neurosurgery, the First Affiliated Bethune Hospital, Jilin University, Changchun 130021, China.
authors: Peng-Fei
authors: PF
authors: Ge
authors: Hai-Feng
authors: HF
authors: Wang
authors: Li-Mei
authors: LM
authors: Qu
authors: Bo
authors: B
authors: Chen
authors: Shuanglin
authors: S
authors: Fu
authors: Yinan
authors: Y
authors: Luo
keywords: Brainstem; Cerebellum; Pilocytic astrocytoma; Pilomyxoid astrocytoma