For predicting glial tumor
, the sensitivity, specificity, positive predictive level, negative predictive level, and the accuracy of the cutoff value for ATRX mutation, p53 mutation, and 1p/19q codeletion are indicated in Table 3.
The histopathological diagnosis of the patients who underwent biopsy due to cerebral intraparenchymal mass was reported as stage IV glial tumor
in 14 patients, stage III glial tumor
in 1 patient and stage II diffuse glial tumor
in 2 patients.
In these locations, schwannomas can resemble other more common intra-axial cystic neoplasms including pilocytic astrocytoma, pleomorphic xanthoastrocytoma , meningioma if near a centrally located nerve root [9, 10, 13, 14], or less commonly a high-grade glial tumor
Benign Tumors Vestibular Schwanomma 78 Tigeminal Schwanomma 6 Other Schwanomma 5 Gliomas Grade I 6 Meningioma 169 Pituitary Adenoma (Secreting) 25 Pituitary Adenoma (Non-Secreting) 42 Pineal Region Tumor 1 Hemangioblastoma 2 Craniopharyngioma 1 Glomus Tumor 5 Other Benign Tumors 43 Total 383 Malignant Tumors Malignant Glial Tumor
(II, III, IV) 60 Metastatic Tumor 192 Oligodendriogliomas 5 Hemangiopericytoma 1 Other Malignant Tumors 16 Total 274 Total Tumors 657 Vascular Disorders AVM's 91 Cavernous Angioma 3 Total 94 Functional Disorders Trigeminal Neuralgia 18 Total 18 Total Indications 769 Table 2.
It is a rare glial tumor
that usually appears submucosally as a pedunculated mass in the midline, attached to the nasal septum.
GP is often mixed with GTS series despite this being a separate entity  because it is defined by pure mature glial tumor
tissue in the peritoneum [29-31] and is encountered in a variety of clinical scenarios [29, 32, 33].
The discovery of an IDH mutation or H3 mutation in a glial tumor
argues strongly against the diagnosis of a poorly infiltrative glioma.
The lesion, despite some similarities (clusters of voluminous neurons with thick bundles of nerve cell processes) is completely different from a tumoral ganglioneuroma or a cerebellar ganglioglioma in which variable architecture discloses proliferation of both abnormal neurons and glial tumor
Although they are the most common intramedullary glial tumor
in adults, ependymomas are the second most common spinal cord neoplasms in children.
Synaptophysin or neuron-specific enolase positivity on immunohistochemistry, or the presence of typical or abortive synapses, neurosecretory granules or neuritic processes on ultrastructural examination, demonstrate the neuronal lineage of the tumor cells, not found in glial tumor
and support the diagnosis of CN (p.
CONCLUSIONS: In the present study glial tumors
are most frequent neoplasm and Ashocytoma is the most common glial tumor