neurilemmoma incidence/prevalence measurement trigeminal nerve neurilemmoma incidence/prevalence measurement 2013-12-09T18:48:27Z Any measurement in which the number of individuals in a study population that display trigeminal nerve neurilemmoma at a point in time or develop trigeminal nerve neurilemmoma within a determined period of time are compared to the total number of individuals in the study population. Often expressed as a percentage but could be expressed as a ratio. A trigeminal nerve neurilemmoma is a tumor originating in the myelin sheath of the trigeminal nerve, either of the fifth pair of cranial nerves which function as the chief sensory nerves of the face and the motor nerves of the muscles of mastication. CMO:0002015 JSmith MESH:D009442 clinical_measurement_ontology trigeminal malignant peripheral nerve sheath tumor incidence/prevalence measurement trigeminal nerve MPNST incidence/prevalence measurement