TAILIEUCHUNG - Ebook Brain tumors: Part 2

(BQ) Part 2 book "Brain tumors" presentation of content: Extraventricular neurocytoma, paraganglioma, pineal parenchymal tumor of intermediate differentiation, classic medulloblastoma, desmoplastic medulloblastoma, anaplastic medulloblastoma, cellular schwannoma, melanotic schwannoma,. and other content. | Case 45: Extraventricular Neurocytoma C L I N I C A L I N F O R M AT I O N The patient is a 27-year-old female who is found to have papilledema following work-up for headaches. An MRI scan shows a large left parieto-occipital cyst with an enhancing mural nodule. She undergoes complete gross total excision of the lesion. OPINION Sections show a calcified, cytologically bland, moderately hypercellular neoplasm, devoid of necrosis or microvascular proliferation. Numerous hyalinized blood vessels are present throughout the tumor, as is focal hemosiderin pigment. The tumor demonstrates diffuse positive staining, with synaptophysin antibody. We consider the lesion to be a low-grade neurocytic tumor and characterize it as follows: Left F I G U R E 4 5 . 1 Lower-magnification appearance of the tumor, demonstrating moderate hypercellularity, hyalinized blood vessels, and vague orientation of tumor cells around blood vessels. Parieto-Occipital Region, Excision–Extraventricular Neurocytoma, WHO Grade II. COMMENT Given the fact that this tumor did not occur within the ventricular system, this neoplasm—which is otherwise histologically identical to central neurocytoma—would be considered an extraventricular neurocytoma. The cystic nature is apparent only on the neuroimaging studies, because the pathologist receives the solid mural nodule portion of the tumor. DISCUSSION Extraventricular neurocytoma is a new entity in the 2007 World Health Organization classification system. Although both central neurocytoma and extraventricular neurocytoma are composed of FIGURE Intermediate magnification shows the neuropil-like fibrillary background, as well as the slight variability in size of tumor nuclei. 134 135 CASE 45: E X T R AV E N T R I C U L A R FIGURE High-power magnification depicts the salt-andpepper chromatin pattern of the nuclei and scant cytoplasm. “uniform round cells that show immunohistochemical and ultrastructural features of neuronal differentiation”

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• Brain tumors
• Extraventricular neurocytoma
• Classic medulloblastoma
• Desmoplastic medulloblastoma
• Anaplastic medulloblastoma
• Cellular schwannoma
• Melanotic schwannoma
• Evolution
• Molecular
• Biology
• therapeutic
• Implications
• Terry Lichtor
• Normal tissue
• Gemistocytic astrocytoma
• Anaplastic astrocytoma
• Glioblastoma multiforme
• Granular cell glioblastoma
• Giant cell glioblastoma
• BMC Cancer
• Breast cancer
• Antiangiogenic treatment
• Bevacizumab administration
• Metastatic brain tumors
• Abnormal structures
• BMC Pulmonary Medicine
• Innate immunity
• Lung epithelial cells
• Deleted in malignant brain tumors 1
• Vascular endothelial growth factor
• Brain Tumours
• Imaging Techniques
• Molecular Aspects
• Anatomic
• Pathological
• Brain Metastases
• Neuroendocrine tumor
• Metastatic brain tumor
• Large cell neuroendocrine tumor
• Small cell carcinoma
• Brain metastasis
• Classic curvature
• Signal resilient to interpolation
• Intensity curvature measure
• Intensity curvature functional
• MRI brain tumors
• BMC Pediatrics
• Children and adolescents
• Social participation
• Patient reported outcomes
• Luận án Tiến sĩ
• Atomic and nuclear physics
• Luận án Tiến sĩ Vật lý
• Spect CT images segmentation software
• Automatic detection
• Brain cancer
• Age period cohort
• Malignant brain neoplasms
• Tumors originate
• Atypical teratoid
• Rhabdoid tumor
• Highly malignant brain tumors
• SMARCB1 gene
• Treatment related mortality
• Toxic death
• Young adults
• Systematic review
• medical report
• Scientific reports
• scientific research
• medical knowledge
• cytoplasm
• analysis of cytoplasmic
• Lung cancer
• Immune checkpoint inhibitors
• Tumor microenvironments
• Programmed cell death 1
• Stereotactic biopsy
• Brain tumor
• Histological diagnostic
• Especially computed tomography
• Magnetic resonance imaging
• Brain surface
• DCAT technique
• VMAT technique
• Primary brain tumors
• Stereotactic radiosurgery
• Metastatic Pancreatic Cancer
• Pancreatic Cancer
• Clinical Course
• Nutrition in Healthy Children
• Growth and Development
• Pediatric Cardiology
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