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[Recurrent facial paresis with facial neurinoma].

PATIENT: A clinical case of a 49-year-old man is described who presented with a right facial paresis for 4 weeks. The patient had undergone a decompression of facial nerve and a radical mastoidectomy elsewhere in 1998 because of a facial paresis and acute mastoiditis. In the following years a complete right facial paresis occurred several times improving with prednisolone. In addition to topognostic examinations a high resolution computed tomography of the temporal bone was made. CT showed a mass in the right tympanic cavity with close contact to the ossicular chain. Diagnostic tympanotomy disclosed a tumor of the tympanic segment of the facial nerve. Pathological examination indicated a diagnosis of neurinoma with an Antoni B architecture. In a second operation the tumor was resected totally and a facial nerve reconstruction was performed by a greater auricular nerve interposition graft. Seven month postoperative beginning nerve reinnervation was seen proceeding continually until the control examination after 1 1/2 year. DISCUSSION: Facial neurinoma are a rare course of facial paresis. There are no specific symptoms. That's why the diagnosis is difficult. But it is necessary to think of with differential diagnosis of facial paresis.

Cranial Nerve Neoplasms↗

[Intratemporal facial neurinoma].

Two patients with intratemporally localised facial nerve schwannomas developed conductive hearing loss beside persisting facial nerve palsy. Tympanotomy revealed a tumour of the facial nerve that was totally removed. In one case reconstruction was performed with great auricular nerve interposition. The long-term follow-up (12 years) showed a good functional result. Facial nerve schwannomas present problems in detection, and reconstruction methods are not safe with regard to long-term prognosis.

Adult↗

[Electrophysiologic monitoring of the facial nerve during otoneurosurgery].

The use of intraoperative facial electromyography (EMG) during otoneurosurgery facilitates anatomic and functional preservation of the VII nerve recording neural activation evoked both mechanically and electrically. The present work presents a personal experience involving the use of this technique in 27 cases of otoneurosurgery (16 neuromas of the acoustic nerve, 4 tympano-jugular paragangliomas, 5 VII nerve decompressions, 1 vestibular neurectomy, and 1 VII nerve neuroma monitored intraoperatively with Nicolet Nerve Integrity Monitor-1 (NIM-2). The latter is a highly sensitive instrument for intraoperative electromyographic recording. It is equipped with a system for electric stimulation, a display and a speaker for the EMG signal and acoustic alarm. During monitoring basically 3 types of EMG responses can be recorded: "burst", "train" and "pulse". In the present work the various EMG patterns are analyzed in detail as well as the relationship between their emergence and the type of surgical procedure performed. Intraoperative interpretation of the EMG activity makes possible more precise, intricate surgical maneuvers. It is felt that intraoperative monitoring has made it possible to preserve the anatomy and functionality of the facial nerve more frequently than is possible with other unmonitored cases. This becomes most evident when evaluating the long-term results.

Cranial Nerve Neoplasms↗

The cause of aural polyps in children.

This 20-year retrospective review identifies 35 pediatric patients with aural polyps in an attempt to assess for clinical predictors of significant otopathologic conditions. Chronic otitis media (43%), cholesteatoma (29%), and retained tympanostomy tubes (23%) were the common causes. Unusual causes included mycobacterial infection and Langerhans' cell histiocytosis. Multivariate analysis revealed the co-occurrence of conductive hearing loss at presentation to be a significant clinical predictor (P = .03) of cholesteatoma; the histopathologic finding of keratin-induced giant cell reaction was nonspecific in this respect. Cholesteatoma was also prevalent in recurrent polyp cases, suggesting the need for prolonged follow-up in those children whose initial clinicopathologic evaluation does not yield a definitive diagnosis.

Adolescent↗

[CANCER OF THE EAR].

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Carcinoma, Squamous Cell↗

The auricular VX2 carcinoma: feasibility of complete tumor resection.

BACKGROUND: The aim of the study was to test the feasibility of resection of VX2 auricular squamous cell carcinoma (SCC) in New Zealand White rabbits (NZW), its influence on the regional and distant metastases and the general prognosis. MATERIALS AND METHODS: In 71 NZW rabbits, successful in sano wide margin resection of auricular VX2 SCC was performed 7 days after tumor induction. The animals were sacrificed and examined for metastases after 6 weeks. RESULTS: Local recurrences occured in 7% of the animals. In 28.2% lymph node (LN) and in 15.5% distant metastases developed. Regional metastases presented in 100% of the animals with recurrence and in 22.7% of the RO animals (p < 0.001). Distant metastases presented in 80% of the animals with local recurrence and in 10.6% of the R0 animals (p < 0.001). Of the animals with local control, those with N+ had a significantly higher incidence of distant metastases (46.7%) compared to those with N0 (0%, p < 0.001). Local control and LN involvement were found to be important prognostic factors for early tumor-related death. CONCLUSION: The VX2 auricular model resembles head and neck (HN) SCC in humans morphologically, pathophysiologically and as a complex neoplastic disease. In the experimental setting it behaved similarly to the clinical situation of wait-and-see in N0 HNSCC patients. Tumoral microemboli present a possible mechanism for the development of recurrences.

Animals↗