Based on a clinical observation and a literature review, etiologic hypothesis, clinical, radiological and therapeutics characteristics of intratympanic primitive meningioma are described. Those tumors arise from arachnoid cells, some may be carried along the nerve sheath within the Fallopian canal during embryology.
Gersdorff, M., Brucher, J.-M., & Vilain, J. (1992). Méningiome primitif du ganglion géniculé : à propos d’un cas. Revue de Laryngologie - Otologie - Rhinologie, 113(1), 51-54. https://hdl.handle.net/2078.5/108573 (Original work published 1992)