Several prognostic factors for locoregional control, distant metastases, and overall survival were found. Postoperative radiotherapy was found to improve locoregional control.

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Background Chylous leakage is an uncommon complication after neck dissection for which several treatment modalities have been described in literature. It occurs in 1% to 2.5% of radical neck dissections, with the majority (75% to 92%) being on the left side. In a consecutive series of patients, we investigated the effect of a systematic approach to the complication. Methods Over a period of 5 years, the drain production of 221 patients who underwent a neck dissection was analyzed. One hundred thirty‐two right‐sided and 139 left‐sided neck dissections were performed. In 11 patients a chyle fistula occurred, 1 right‐sided and 10 left‐sided. In all cases closed vacuum suction drainage was continued and dietary modifications (medium‐chain triglycerides [MCT]/PeptisonR nasogastric tube feeding [PNTF]) were made. Results In 5 patients dietary modifications were sufficient to stop the leak. In the other 6 patients total parenteral nutrition via the subclavian vein (TPN) was started. In 2 cases with a severe intractable hypoalbuminemia, surgical intervention was necessary. The leak was closed by a pectoralis major muscle flap transfer, after local application of fibrin sealant (TissucolR). Conclusions Chylous leakage is a controllable complication after neck dissection for which in most cases a stepwise conservative approach consisting of dietary modifications, maintaining closed vacuum suction drainage, seems to be sufficient. Hematologic and serum values should be monitored very carefully and corrected appropriately. To initiate planned postoperative radiotherapy in a timely fashion, the conservative treatment should be limited to about 30 days. HEAD & NECK 1996;18:347–351 © 1996 John Wiley & Sons, Inc.

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The effect of radiotherapy on hearing was studied in 30 patients who were treated by surgery and radiotherapy for a parotid neoplasm. Functions of the irradiated ear were compared with those of the non-irradiated ear in the same patient. Tympanometry showed a small but significant reduction of static compliance on the irradiated side when compared with the non-irradiated side. Audiometry showed a significant increase in hearing loss in the 1-2, 4-8 and 10-20 kHz ranges that increased with frequency. This hearing loss was mainly sensorineural in contrast to hearing loss at 250-500 Hz, where it was more of a conductive type. There appeared to be a significant dose-effect relation in sound perception at 4-8 kHz. Doses to the cochlea of less than 55 Gy seldom caused a hearing loss, in contrast to doses exceeding 65 Gy. Overall, radiotherapy was found to cause significant, mainly sensorineural hearing losses, which were partly dose-dependent.