We report a case of a large @entity816 associated with @entity2758 in the right cerebral hemisphere of a 16-year-old @entity1 . Neuroimaging showed large abnormal vessels with flow voids and arteriovenous shunt around the @entity5409 . Histologically, the cyst wall was formed by abnormal vasculature and clusters of glial cells forming a papillary growth pattern. The abnormal vasculature consisted of @entity384 and medium-sized arteries with incomplete media, and was diagnosed as an @entity2758 . Immunohistochemically, @entity538 ( @entity538 ) decorated both the perikaryon and the processes of the @entity5 cells. They were negative for epithelial membrane antigen (EMA), cytokeratin, and S-100 protein. Ultrastructurally, the @entity5 cells were rich in intermediate filaments, and neither cilia, microvilli, nor ependymal rosettes were verified. Based on these morphological features and the low @entity1758 labeling index of 0.8%, the @entity5 was diagnosed as @entity816 , @entity816 , according to the World Health Organization (WHO) @entity5 classification. An association of @entity11 with various types of @entity455 has been designated as angioglioma. A unique feature of the present case, however, is a papillary growth pattern, which is not listed in the current WHO classification of @entity1313 . The recognition of the occurrence of such cases would be important in differential diagnosis of @entity424 and @entity2846 .

A case of angioglioma composed of XXXX with a papillary growth pattern: immunohistochemical and ultrastructural studies.

@entity1 :: ('9606', 'Species') :: ['boy'] @entity455 :: ('MESH:D014652', 'Disease') :: ['vascular anomalies'] @entity2758 :: ('MESH:D001165', 'Disease') :: ['arteriovenous malformation'] @entity5409 :: ('MESH:D052177', 'Disease') :: ['cystic lesion'] @entity424 :: ('MESH:D004806', 'Disease') :: ['papillary ependymoma'] @entity1313 :: ('MESH:D001932', 'Disease') :: ['brain tumors'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'glial tumor'] @entity384 :: ('MESH:D002311', 'Disease') :: ['dilated vein-like vessels'] @entity538 :: ('2670', 'Gene') :: ['GFAP', 'glial fibrillary acidic protein'] @entity11 :: ('MESH:D005910', 'Disease') :: ['glioma'] @entity816 :: ('MESH:D001254', 'Disease') :: ['Grade II', 'astrocytoma', 'cystic astrocytoma'] @entity2846 :: ('MESH:D020288', 'Disease') :: ['choroid plexus papilloma'] @entity1758 :: ('57534', 'Gene') :: ['MIB-1']
@entity816 :: (MESH:D001254,Disease) :: ['astrocytoma']
