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ABS TRACT Malignant schwannoma is rarely found in the paranasal sinuses and nasal cavity. Only 21 cases have been reported in the literature so far. Only four of the 21 cases were reported to be primarily originated from the maxillary sinus. In this article, a 44-year-old woman with a right maxillary sinus malignant schwannoma is presented. Right partial maxillectomy with lateral rhinotomy approach followed by a postoperative course of radiotherapy and chemotherapy was performed as the treatment. This mass was confirmed as a malignant schwannoma in histological examination and immunohistochemical staining. There was no tumor recurrence or distant metastases for 22 months after the treatment. She died from brain metastasis and sepsis 37 months after the operation.

Pleomorphic adenoma is the most common benign tumor of the parotid gland .The treatment is surgery.The rate of reccurence is high when the enucleation surgery is performed. İn order to minimize the reccurences, a superficial parotidectomy by protecting facial nerve should be performed. Treatment for reccurences is total parotidectomy, recurrences may be single nodule or multifocal. Magnetic Resonance İmaging (MRI) is known to be the most important diagnostic method for recurrent multifocal pleomorphic adenmas. İn this article we present a recurrent multifocal pleomorphic adenoma of the parotid gland Pleomorfik adenoma, parotis bezinin benign tümörleri arasında en yaygın olanıdır. Tedavisi cerrahidir. Enükleasyon ameliyatı yapılanlarda rekürrens oranı yüksektir. Rekürrensleri en aza indirmek için fasiyal sinirin korunduğu yüzeyel parotidektomi ameliyatı yapılmalıdır. Rekürrenslerde tedavi, total parotidektomidir, rekürrensler tek nodül veya çok odaklı olabilmektedir. Tekrarlayan çok odaklı pleomorfik adenomlarda en önemli tanı yönteminin Manyetik Rezonans Görüntüleme (MRG) olduğu bilinmektedir. Bu makalede parotis bezinin tekrarlayan, çok odaklı pleomorfik adenom olgusunu sunuyoruz.