Abstract:
:Recent reports have suggested an important clinical role for hypermethylation of the O(6)-methylguanine-DNA-methyltransferase (MGMT) promoter in patients with glioblastomas. Whether MGMT protein expression is correlated with promoter hypermethylation and patient outcomes, however, has not been elucidated. Here we describe a quantitative digital method for assessment of MGMT-specific immunostaining, and analyze the relationship between expression levels and methylation status of the MGMT promoter. We investigated 46 tumors from patients who received a diagnosis of glioblastoma or gliosarcoma. Immunohistochemistry with anti-MGMT antibody and methylation-specific PCR using bisulfite-modified tumor DNA were performed. The digital assessment method used image-analysis software to determine a digital MGMT staining index, and the results were compared with those obtained via conventional visual assessments. The digital staining index clearly correlated with the methylation status of MGMT promoter. In addition, the index correlated with our observational results when nuclear and cytoplasmic staining were assessed in three different fields. Our digital assessment method enabled us to assess uncertain immunopositive samples objectively and quantitatively, which is an important consideration when examining heterogeneous cellular staining. We expect that this method will be useful for assessment of heterogeneous staining with any antibodies.
journal_name
Brain Tumor Patholjournal_title
Brain tumor pathologyauthors
Araki Y,Mizoguchi M,Yoshimoto K,Shono T,Amano T,Nakamizo A,Suzuki SO,Iwaki T,Sasaki Tdoi
10.1007/s10014-010-0004-2subject
Has Abstractpub_date
2011-02-01 00:00:00pages
25-31issue
1eissn
1433-7398issn
1861-387Xjournal_volume
28pub_type
杂志文章abstract::Meningioma is the most common intracranial tumor, arising from arachnoid cells of the meninges. Monosomy 22 and inactivating mutations of NF2 are well-known genetic alterations of meningiomas. More recently, mutations in TRAF7, AKT1, KLF4, SMO, and PIK3CA were identified by next-generation sequencing. We here reviewed...
journal_title:Brain tumor pathology
pub_type: 杂志文章,评审
doi:10.1007/s10014-016-0271-7
更新日期:2016-10-01 00:00:00
abstract::Candidate genes involved in metastasis to the brain require investigation. In the present study, the adenomatous polyposis coli (APC) gene was analyzed in a set of human brain metastases. Gross deletions of the APC gene were tested by polymerase chain reaction/loss of heterozygosity (LOH) using the restriction fragmen...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-011-0030-8
更新日期:2011-07-01 00:00:00
abstract::Lymphocytic infundibulo-neurohypophysitis (LINH) was first reported by Saito et al. and Imura et al. as a cause of idiopathic central diabetes insipidus. Magnetic resonance (MR) imaging with a contrast medium demonstrates thickening of the pituitary stalk, enlargement of the neurohypophysis, or both with homogeneous e...
journal_title:Brain tumor pathology
pub_type: 杂志文章,评审
doi:10.1007/s10014-008-0234-8
更新日期:2008-01-01 00:00:00
abstract::Despite recent advances in the diagnosis and treatment of glioblastomas, patient outcomes for these highly malignant tumors remain poor. Research into the molecular pathology of glioblastoma has uncovered various genetic changes that contribute to malignancy. Some of the identified molecular markers--such as loss of h...
journal_title:Brain tumor pathology
pub_type: 杂志文章,评审
doi:10.1007/s10014-011-0038-0
更新日期:2011-07-01 00:00:00
abstract::Detection of mutations in the isocitrate dehydrogenase 1 (IDH1) gene is useful for accurate diagnosis of lower grade gliomas, as described in the 2016 World Health Organization classification of tumors of the central nervous system. Conventional analysis tools, including Sanger DNA sequencing and immunohistochemistry,...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-018-0310-7
更新日期:2018-04-01 00:00:00
abstract::Diffuse leptomeningeal glioneuronal tumor (DL-GNT) is a newly introduced tumor entity of uncertain prognosis characterised by a primary diffuse leptomeningeal growth pattern, oligodendroglial-like morphology and dual glial/neuronal differentiation. Predominantly occurring in children, these tumors present as chronic m...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-018-0325-0
更新日期:2018-07-01 00:00:00
abstract::Hemangioblastoma is composed of neoplastic stromal cells and a prominent capillary network. To date, the identity of stromal cells remains unclear. Mesenchymal stem cells can give rise to committed vascular progenitor cells, and ephrin-B2/EphB4 and Notch signaling have crucial roles in these steps. The aim of our stud...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-018-0323-2
更新日期:2018-10-01 00:00:00
abstract::The role of intraoperative pathological diagnosis for central nervous system (CNS) tumors is crucial for neurosurgery when determining the surgical procedure. Especially, treatment of carmustine (BCNU) wafers requires a conclusive diagnosis of high-grade glioma proven by intraoperative diagnosis. Recently, we demonstr...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-015-0238-0
更新日期:2016-01-01 00:00:00
abstract::Small cell glioblastoma is a histological subtype of glioblastoma with characteristic features of highly proliferative, monotonous small glial cells with high nuclear cytoplasm ratio. Morphologically, malignant lymphoma or small cell metastatic carcinoma should be carefully discriminated. Some cases are difficult to d...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-013-0158-9
更新日期:2014-04-01 00:00:00
abstract::Ollier disease (OD) and Maffucci syndrome are rare conditions due to a post-zygotic somatic mutation that results in mosaicism. In addition to enchondromas and hemangiomas, some of these patients also develop other unrelated tumors, such as gliomas, that harbor IDH mutations, suggesting that an IDH mutation is a commo...
journal_title:Brain tumor pathology
pub_type: 杂志文章,评审
doi:10.1007/s10014-018-0327-y
更新日期:2018-10-01 00:00:00
abstract::Congenital malignant gliomas are rare brain tumors about which few reports have been published. We present the clinical course and genetic alterations in an infant with a congenital malignant glioma detected incidentally by ultrasonography at 36 weeks. The tumor occupied the right temporoparietal region, extended to t...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-011-0071-z
更新日期:2012-04-01 00:00:00
abstract::Pleomorphic xanthoastrocytoma (PXA) has been considered an astrocytic tumor with a relatively favorable prognosis. However, PXA cases having several recurrent patterns with poor prognosis have been reported in recent years, and a new concept of anaplastic PXA has been proposed. The present case was a 59-year-old woman...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-006-0197-6
更新日期:2006-04-01 00:00:00
abstract::We report four cases of high-grade astrocytoma with a BRAF V600E mutation, ATRX inactivation, and CDKN2A/B homozygous deletion. Children to young adults aged 3-46 presented with a well demarcated contrast-enhancing mass in the supratentorial area. Pathological examination revealed packed growth of short spindle to rou...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-019-00344-z
更新日期:2019-07-01 00:00:00
abstract::Atypical teratoid/rhabdoid tumor (AT/RT), a recently established central nervous system tumor entity, occurs in children and is more malignant than medulloblastoma/primitive neuroectodermal tumors (PNET). We report here a case of AT/RT in a male infant who was 9 months old at the time of diagnosis. Magnetic resonance ...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/BF02483446
更新日期:2003-01-01 00:00:00
abstract::Although tissue confirmation is essential for a diagnosis of primary central nervous system large B-cell lymphoma (PCNSBL), accurate assessment may still be difficult, even when tissue is obtained. We report a 59-year-old man, first diagnosed as multiple sclerosis by open biopsy at another institution, who was then co...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-010-0264-x
更新日期:2010-04-01 00:00:00
abstract::The incidence of hemorrhagic onset in pilocytic astrocytoma and pilomyxoid astrocytoma, and the clinical and histological characteristics, were compared to other types of neuroepithelial tumors or nonhemorrhagic pilocytic astrocytoma by retrospective review of 445 consecutive neuroepithelial tumors treated at our inst...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-008-0243-7
更新日期:2009-01-01 00:00:00
abstract::Glioblastoma with a primitive neuronal component (GBM-PN) was renamed from glioblastoma with primitive neuroectodermal tumor-like component (GBM-PNET) in the new WHO classification of tumors of the central nervous system in 2016. GBM-PN is a rare variant of glioblastoma. There were not so many publications on the inve...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-019-00334-1
更新日期:2019-07-01 00:00:00
abstract::We report an unusual case of extraventricular (cerebral) neurocytoma with a long, 25-year history, and which appeared to transform to neuroblastoma. In 1978, an 18-year-old woman was treated for right frontal oligodendroglioma. Eighteen years later (in 1996), recurrence of tumor in the fourth ventricle was noted and w...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-006-0210-0
更新日期:2007-01-01 00:00:00
abstract::Papillary tumor of the pineal region (PTPR) is a recently described neoplasm. Several studies have been published on this tumor, but its pathological features and the appropriate treatment remain unclear. PTPR is reported to originate from ependymal cells in the subcommissural organ. Isocitrate dehydrogenase 1 and 2 (...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-012-0098-9
更新日期:2013-01-01 00:00:00
abstract::Dysembryoplastic neuroepithelial tumor (DNT) is a relatively new nosologic entity. First described in 1988, it is now included in the "neuronal and mixed neuronal-glial tumours" category in the revised 2000 World Health Organization (WHO) Classification of Tumours of the Nervous System. The collective experience of mo...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/BF02478934
更新日期:2002-01-01 00:00:00
abstract::With the use of RT-PCR (reverse transcriptase-polymerase chain reaction), Northern blot analysis, and Western blot analysis, seven primary brain lymphomas were examined for the state of the MMACI tumor suppressor gene. Nucleotide analysis of RT-PCR clones revealed no abnormality in the MMAC1 coding sequence in each ca...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/BF02479427
更新日期:2001-01-01 00:00:00
abstract::An 18-year-old girl presented with a history of visual disturbance without headache, nausea, or vomiting in May 2010. In July 2010, the patient visited our hospital because of visual disturbance. Head magnetic resonance images revealed hydrocephalus caused by a ring-enhancing mass lesion located in the vermis. Total ...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-011-0074-9
更新日期:2012-04-01 00:00:00
abstract::A 43-year-old woman who had undergone breast cancer surgery 1 year previously complained of headache and nausea. Her brain computed tomography (CT) scan and magnetic resonance imaging (MRI) showed a well-circumscribed, heterogeneously enhanced tumor in the right thalamus. She underwent gross total resection of the tum...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-005-0173-6
更新日期:2005-01-01 00:00:00
abstract::The IDH-mutant and 1p/19q co-deletion (1p19q codel) provides significant diagnostic and prognostic value in lower-grade gliomas. As ATRX mutation and 1p19q codel are mutually exclusive, ATRX immunohistochemistry (IHC) may substitute for 1p19q codel, but this has not been comprehensively examined. In the current study,...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-018-0312-5
更新日期:2018-04-01 00:00:00
abstract::Xanthogranuloma of the sellar region is a rare clinical observation. Although it was included in the World Health Organization (WHO) brain tumor classification in 2000, its clinical features and pathogenesis remain uncertain. We report herein seven cases of xanthogranuloma of the sellar region who underwent transsphen...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-012-0130-0
更新日期:2013-10-01 00:00:00
abstract::Accumulating evidence suggests that tissue hypoxia and apoptosis play important roles in the malignant progression of brain tumors. We investigated the relationship of 14-3-3zeta (an apoptosis-related protein), HIF-1α, and VEGF immunohistochemistry, and evaluated the prognostic value of their expression in human brain...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-013-0135-3
更新日期:2014-01-01 00:00:00
abstract::A 37-year-old man, a hepatitis B virus carrier due to mother-to-child transmission, had a medical examination in September 2008 in nearby hospitals due to anorexia and weight loss. He was transported to our hospital because computed tomography (CT) detected intracranial lesions, and he had a positive human immunodefic...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-010-0001-5
更新日期:2011-02-01 00:00:00
abstract::Medulloblastomas with myogenic differentiation, previously termed medullomyoblastomas, form rare variants of medulloblastomas. Occasional tumors showing combined myogenic differentiation and melanotic tubular structures have also been described. On studying the records of a tertiary-care super specialty hospital, of 8...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-012-0102-4
更新日期:2013-01-01 00:00:00
abstract::Intraoperative rapid diagnosis has been a useful neurosurgery tool for maximal resection and minimal morbidity. However, only a few studies have been conducted regarding diagnostic accuracy and associated problems. The present study reviews our experience in treating patients and investigates the accuracy and problems...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-007-0219-z
更新日期:2007-01-01 00:00:00
abstract::Somatic mutations in NRAS, PTEN and AKT1 genes are rarely (~1%) reported in primary NSCLC, but their role in carcinogenesis have been proven. Therefore, we assessed the frequency of them in 145 FFPE tissue samples from CNS metastases of NSCLC using the real-time PCR technique. We identified four (two NRAS and single A...
journal_title:Brain tumor pathology
pub_type: 杂志文章
doi:10.1007/s10014-016-0276-2
更新日期:2017-01-01 00:00:00