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SUMMARY Malignant peripheral nerve sheath tumors are rare in the head and neck region. A tumor arising in the intraparotid region of the facial nerve, suggestive of pleomorphic adenoma preoperatively is presented. Facial nerve was found to be involved by tumor intraoperatively, requiring total parotidectomy and sacrifice of the involved portion of the… (More)
We calculate a regularized trace formula for a second order differential operator with bounded operator coefficient given in a finite interval. 2007 Elsevier Inc. All rights reserved.