... are differently termed as coexisting tumors, collision tumors and concurrent tumors. This condition usually occurs with gene mutations, such as that of NF2 gene that is related to multiple meningiomas. NF2 gene mutation is characterized by hamartomatous and/or neoplastic proliferation of Schwann, meningothelial...

... report the case of a 58-year-old man, diagnosed with a solitary pulmonary nodule in the left lower lobe that was resected through a thoracotomy. The pathology revealed lung metastases of an undiagnosed meningothelial meningioma. The evolution of the patient’s case, the second case in the literature...

... is usually observed with meningothelial forms. Furthermore, the study of tumor cells by electron microscopic methods indicates that secretory-excretory activity is closely associated with the production of peritumoral edema. The ultrastructural aspects of this secreted material are described, but further...

...Oxford University Press Central nervous system mesenchymal, non-meningothelial tumors are rare soft tissue or chondro-osseous tumors that uniquely or frequently involve the brain and spinal cord. In the 2021 World Health Organization (WHO) classification of tumors involving the central nervous...

...Oxford University Press Meningiomas are the most common primary brain tumor diagnosed in adults. Arising from the arachnoid (meningothelial) cells of the inner layer of the dura, they are often slow growing, but can lead to significant morbidity. They can invade through the outer layer of dura...

...Oxford University Press Non-meningothelial tumours of the meninges constitute a rare but diverse group of pathologies and consist of mesenchymal, melanocytic, and metastatic lesions. Haemangioblastomas constitute a separate but related lesion that can affect the meninges. Although the bulk...