Genomic Biomarkers of Meningioma: A Focused Review.

Meningiomas represent a phenotypically and genetically diverse group of tumors which often behave in ways that are not simply explained by their pathologic grade. The genetic landscape of meningiomas has become a target of investigation as tumor genomics have been found to impact tumor location, recurrence risk, and malignant potential. Additionally, targeted therapies are being developed that in the future may provide patients with personalized chemotherapy based on the genetic aberrations within their tumor. This review focuses on the most common genetic mutations found in meningiomas of all grades, with an emphasis on the impact on tumor location and clinically relevant tumor characteristics. NF-2 and the non-NF-2 family of genetic mutations are summarized in the context of low-grade and high-grade tumors, followed by a comprehensive discussion regarding the genetic and embryologic basis for meningioma location and phenotypic heterogeneity. Finally, targeted therapies based on tumor genomics currently in use and under investigation are reviewed and future avenues for research are suggested. The field of meningioma genomics has broad implications on the way meningiomas will be treated in the future, and is gradually shifting the way clinicians approach this diverse group of tumors.

[Tumoral degeneration occurring over a non-healing meningocele. Report of two cases]. / Degeneración tumoral en meningocele no intervenido. Descripción de dos casos.

A giant meningocelic sac has not been usually described in adult patients, due to the fact that it shows a low incidence and few newborn have survived to date though the malformation is benign. We report two cases of patients born with the described malformation and who were not operated at that time, so they reached adulthood with bigger sacs. They needed surgery to remove the sacs, for a different reason. The older one had a fistulous abcess but the LCR did not come out, and it did not improved by the application of topic and antibiotic treatment. The other patient showed a progressive growth of the malformation during the last year, skin hardening and pain. The histological study of the dried sacs proved the existence of a carcinomatous degeneration. In the patients we have treated, it seems that a chronic irritation of the LCR and the appearance of multipotent cells in the meningocele may favour the malignancy of the tissues surrounding the sac. This possible malignancy, already described in the bibliography, suggests a prompt elective surgical treatment of the patients with these congenital lesions as soon as possible.

Congenital intracranial meningioma. A case report and literature review.

A case report of congenital intracranial meningioma is presented. We describe what appears to be the first fetal meningioma of the fibroblastic subtype. The literature is reviewed, and the subtype and sex distribution of fetal meningiomas is discussed.

[Isolated ethmoid meningioma. Apropos of a case]. / Méningiome ethmoïdal isolé. A propos d'une observation.

A case of meningioma confined to the ethmoid region is reported. After emphasizing the rare nature of these primary localizations, and their clinical latency, a brief summary is given of the embryologic origin of these tumors. Comparison of the long-term course of double-sac meningiomas and those developing primarily in the ethmoid region showed improved prognosis for the latter, following total surgical excision, the former having a very marked tendency to recur.