pleomorphic xanthoastrocytoma

(redirected from xanthoastrocytoma)

ple·o·mor·phic xan·tho·as·tro·cy·to·ma

a rare variant of astrocytoma usually presenting early in life with seizures. The tumor is superficially located and composed of pleomorphic glial cells, lipidized astrocytes, and perivascular lymphocytes.
Synonym(s): xanthoastrocytoma

pleomorphic xanthoastrocytoma

(zan″thō-as″trŏ-sī-tō′mă) [ xantho- + astrocytoma],


A rare, relatively slow-growing astrocytoma composed of cells of many sizes and shapes. The tumor is usually diagnosed in adolescents and young adults. Microscopic specimens often reveal fatty cells, fibrillar cells, and involvement of the leptomeninges of the brain.
References in periodicals archive ?
The latter group excludes noninfiltrating astrocytomas, such as pilocytic astrocytoma, subependymal giant cell astrocytoma, and pleomorphic xanthoastrocytoma.
Pleomorphic Xanthoastrocytoma (PXAs) are superficially located tumours adjacent to the leptomeninges with an enhancing mural nodule.
A magnetic resonance imaging scan was subsequently done, and the report suggested the presence of a large, left frontal lobe, multicystic inhomogenous tumour with characteristics consistent with a ganglioglioma or pleomorphic xanthoastrocytoma.
While high-grade glial neoplasms and metastatic disease often present acutely with new onset seizures, lower grade malignancies such as ganglioglioma, pleomorphic xanthoastrocytoma, dysembryoplastic neuro-epithelial tumor (DNET), and pilocytic astrocytoma often localized to the neocortical areas and can present clinically and radiographically similar to cortical dysplasias.
Pleomorphic xanthoastrocytoma (PXA) is rare primary neoplasm of brain.
Tumor histology of pediatric patients with brain tumors (n=136) Tumor N Pilocytic astrocytoma (WHO grade I) 42 Medulloblastoma 12 Ependymoma (WHO grades I , II, III) 11 Astrocytoma (WHO grade II) 11 Craniopharyngioma 11 Astrocytoma (WHO (grades III & IV) 6 Choroid plexus papilloma (WHO grade I) 5 Germinoma 5 PNET 5 Dermoid cyst 4 SEGA (WHO grade I) 4 Meningioma 3 Ganglioglioma (WHO grade I) 2 Metastatic 2 Oligodendroglioma (WHO grade II) 3 Choroid plexus carcinoma (WHO grade III) 1 Epidermoid cyst 1 Hemangiopericytoma 1 Pilomyxoid astrocytoma 1 Pineocytoma (WHO grade II) 1 Pleomorphic xanthoastrocytoma 2 Rathke's cleft cyst 1 Schwannoma (WHO grade I) 1 Pituitary adenoma 1 Table 3.
Tumor-specific uptake was observed in 7/8 malignant glioma patients, 7/7 metastatic melanoma patients, 3/4 non-small cell lung cancer patients, 6/7 colon cancer patients, 2/3 pancreatic cancer patients, 2/2 prostate cancer patients, 1/4 breast cancer patients, and one evaluable patient each with transitional cell carcinoma, pleomorphic xanthoastrocytoma and metastatic paraganglioma.
Pleomorphic Xanthoastrocytoma (PXA) is a rare tumor in children and young adults.
30) A large number of diagnostic entities fall into this category, including pilocytic astrocytoma (PA), ganglioglioma, pleomorphic xanthoastrocytoma (PXA), rosette-forming glioneuronal tumor (RGNT), and dysembryoplastic neuroepithelial tumor (DNET).
The pleomorphic xanthoastrocytoma (PXA), described for the first time in 1979, is a rare tumor of the Central Nervous System, accounting for less than 1% of all astrocytic tumors (1,2).
Brain, right Pleomorphic xanthoastrocytoma temporal lobe (WHO II) Bone, posterior Giant cell tumor cranial fossa Lymph node, PNET/Ewing sarcoma retroperitoneal Eye, right Malignant melanoma Bone and dura, right Melanotic neuroectodermal tumor of parietal region infancy Bone, third thoracic Langerhans cell histiocytosis?
One case was diagnosed as AT/RT by 2 of the 3 central pathologists, and 1 case was diagnosed as pleomorphic xanthoastrocytoma by 2 of the 3 central pathologists.