anaplastic meningioma

An aggressive form of meningioma, which is defined histologically as having > 20 mitoses/10 high-power fields and/or marked cytologic atypia.

References in periodicals archive ?

At 1.5 Tesla, mean ADC value for typical meningioma was 1.05+-0.11x10-3 and atypical/ anaplastic meningioma was 0.70 +- 0.04x10-3.

Role of ADC values and ratios of MRI scan in differentiating typical from atypical/anaplastic meningiomas

The diagnosis of anaplastic meningioma involving the spinal cord with extra neural metastasis of the present study was obtained through the clinical, histopathological and IHC findings.

Spinal cord anaplastic meningioma with extra-neural metastasis in a cat/ Meningioma anaplasico medular com metastases extra-neurais em um felino

KLF4 is a tumor suppressor in anaplastic meningioma stem-like cells and human meningiomas.

Meningiomas--insights into genetics and correlations with histological features

In our series, 2 men and 2 women (4 patients, 14.81%) were proved to have malignant transformation to anaplastic meningioma from atypical meningioma during the following operations to their recurrent disease.

Intracranial Atypical Meningiomas: A Case Series

Ramzan, "Intraparenchymal anaplastic meningioma in a child: a rare entity," Asian Journal ofNeurosurgery, vol.

Atypical Growth Pattern of an Intraparenchymal Meningioma

Out of 10 malignant glial tumours 5 cases (50%) were reported as glioblastoma, 4 cases (40%) were reported as high grade astrocytoma and in one case suspicion of anaplastic meningioma was offered which was confirmed on paraffin section.

Role of squash smear technique in intraoperative diagnosis of CNS tumours

Classic, atypical, and anaplastic meningioma: three histopathological subtypes of clinical relevance.

The oncofetal protein IMP3: a novel molecular marker to predict aggressive meningioma

Twenty-seven cases of WHO grade I meningiomas would have increased in grade to atypical meningiomas (WHO grade II), and one atypical meningioma would have increased to anaplastic meningioma (WHO grade III).

Phosphohistone H3: new standard IHC marker for grading tumors via mitotic indexing

Ki-67 proliferative index predicts clinical outcomes in patients with atypical or anaplastic meningioma. Neuropathology, 27(2), 114-120.

It's not your "Run of the Mill" meningioma: characteristics differentiating low-grade from high-grade meningeal tumors

There were not any features suggestive of atypical or anaplastic meningioma such as nuclear pleomorphism, increased mitosis, atypical mitosis or necrosis.

Ectopic meningioma of the mandible: a rate site of presentation for a common tumour

One case diagnosed as glioblastoma multiforme as it showed strong reactivity for GFAP, vimentin and negative for EMA, which ruled out possibility of anaplastic meningioma. Sarcoma is easily confused with glioblastoma on H&E staining, but GFAP reveals the glioblastoma.

Immunohistochemistry: a diagnostic tool for accurate characterization of undifferentiated malignant tumours

The aggressive clinical course and short survival are consistent with both anaplastic meningioma and a high-grade sarcoma.

Emergence of a high-grade sarcoma in a recurrent meningioma: malignant progression or collision tumor?