Trigeminal neuropathy: evaluation with MR imaging.

Abstract

Scientific Exhibit Volume 15 Number 4 trigeminal nerve (arrows). nerve can be divided into four segments: brain stern, cistern, the Meckel cave and cavernous sinus, and extracranial. Knowledge of the most common pathologic conditions occurring in each location permits the radiologist to narrow the differential diagnosis. infraorbital nerve FRy2 mylohyoid nerve ant. belly of digastr#{232}c m rn 798 U Scientific Exhibit Volume 1 5 Number

Metastases in Meckel's Cave

“…Therefore, the entire course of the trigeminal nerve must be visualized from the brainstem origin to the peripheral endplates. MR-imaging is considered the method of choice for evaluating patients with trigeminal nerve disorders in most clinical settings [9] because it detects the full ex- tent of lesion especially in the basal cisterns and skull base [10] and displays intradural tumor components.…”

Mandibular drop resulting from bilateral metastatic trigeminal neuropathy as the presenting symptom of lung cancer

“…This peculiar mode of cancer spread along trigeminal nerves is well documented in the literature and may lead to the involvement of even long nerve segments before provoking consistent sensory clinical symptoms [1,8,9]. This occurrence has been described mainly in the surgical and radiological literature as most cases represent follow-up studies of unsuccessfully resected face and neck cancers [1,5,7,8,9].…”

The Role of Imaging for Trigeminal Neuralgia

“…A majority originate within CN V.d at the gasserian ganglion. 29 On CT they present as an isodense mass that can cause smooth expansion and remodeling of foramina through which they pass. On MRI, they are typically isointense or hypointense to gray matter and slightly hyperintense on T2-weighted images and can show solid or heterogeneous enhancement depending on the degree of cystic change or possible hemorrhage present in larger lesions (Fig.…”