[CT and MR imaging of the facial nerve]. / Computer- und Magnetresonanztomographie des N. facialis.

Modern imaging techniques used for depicting the facial nerve include multi-slice spiral computed tomography (CT) and high-field magnetic resonance imaging (MRI). CT is the gold standard for imaging the osseous structures of the temporal bone. As a result of its excellent soft tissue contrast, MRI enables identification of the facial nerve itself. Due to high spatial resolution and the possibility to generate multiplanar reconstructions, both CT and MRI facilitate an exact evaluation of anatomical structures in all three spatial planes. The present article provides an overview of relevant anatomical structures, a thorough knowledge of which is the basic prerequisite to understanding pathologies and interpreting radiological findings correctly. Furthermore, basic techniques and strategies for imaging the facial nerve using CT and MRI are explained in general. The articles concludes with specific requirements for the radiological diagnosis of dysplasia, neoplasms and trauma, as well as vascular and inflammatory diseases.

Neuralgic amyotrophy associated with temporary vocal fold paralysis: successful treatment by vocal fold augmentation with hyaluronic acid.

BACKGROUND: Neuralgic amyotrophy is a polyneuropathy that classically involves the brachial plexus. This paper reports an unusual clinical manifestation associated with vocal fold paralysis. CASE REPORT: A 36-year-old male presented with hoarseness and progressive weakness of the right shoulder and upper arm muscles. Laryngoscopy revealed a limited adduction of the right vocal fold. RESULTS: Subsequent speech therapy did not improve the symptoms. Therefore, vocal fold augmentation by application of hyaluronic acid in the right vocal fold was performed. CONCLUSION: Vocal fold augmentation with resorbable material seems to be a more effective transient treatment than speech therapy alone for patients with neuralgic amyotrophy and laryngeal involvement.