Intraoperative frozen cytology of intraosseous cystic meningioma in the sphenoid bone

Middle ear adenoma: Cytohistologic features and differential diagnosis

Middle ear adenomas are rare, low grade glandular neoplasms with epithelial and neuroendocrine components and with varying patterns of differentiation. Due to the rarity of this tumor, there is a dearth of publications detailing the cytological features. We herein review our institution's pathological database for cytological material between 1992 and 2022 for MEA specimens and discuss possible differential diagnoses based on clinical, pathological, and cytologic data and material.

Exploring the role of epidermal growth factor receptor variant III in meningeal tumors

Meningioma is the second most common type of intracranial brain tumor. Immunohistochemical techniques have shown prodigious results in the role of epidermal growth factor receptor variant III (EGFR vIII) in glioma and other cancers. However, the role of EGFR vIII in meningioma is still in question. This study attempt the confer searches for the position attained by EGFR vIII in progression and expression of meningioma. Immunohistochemistry technique showed that EGFR vIII is highly expressed in benign tumors as compared to the atypical meningioma with a highly significant p-value (p<0.05). Further analysis by flow cytometry results supported these findings thus presented high intensity of EGFR vIII in low grades of meningioma. The study revealed that the significant Ki 67 values, to predictor marker for survival and prognosis of the patients. Higher expression of EGFR vIII in low grades meningiomas as compared to high-grade tumors indicate towards its oncogenic properties. To our knowledge, limited studies reported in literature expressing the EGFR vIII in meningioma tumors. Hence, Opinions regarding the role that EGFR vIII in tumorigenesis and tumor progression are clearly conflicting and, therefore, it is crucial not only to find out its mechanism of action, but also to definitely identify its role in meningioma.