Otolaryngologia polska = The Polish otolaryngology · 2012
[Analysis of recurrence and treatment results of parotid gland non-malignant tumors with particular focus on pleomorphic adenoma].
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Wierzbicka Małgorzata, Kopeć Tomasz, Szyfter Witold
Аннотация
UNLABELLED: The aim of the study was to assess the correlation between non-malignant parotid gland tumors recurrence and patient related parameters (age, gender, duration of complaints), type of tumor (histological pattern, the tumor diameter, primary localization in superficial or a deep lobe) and the treatment methods. The endpoint of the analysis was to come up with the presentation of the treatment methods applied to pleomorphic adenoma.
MATERIAL AND METHODS: between 1997 and 2006, 675 patients with non-malignant tumors of parotid gland were treated in a single institution, the tertiary center for ENT at the University Department in Poznań. In the case of 249 patients--extracapsullar dissection was the adopted method of treatment, while in the case of the remaining 426 patients--lateral parotidectomy was performed.
RESULTS: recurrence of tumor was diagnosed in 24 cases: 16 patients were found to have tumor with pleomorphic adenoma, 5--with cystadenolymphoma, 1--with onkocytoma, 1--with lipoma and 2--with monomorphic adenoma. Recurrence most often occurred inter-related with the two most common types of tumors: pleomorhic adenoma in 5% of the cases (12 out of 237) and cystadenolymphoma in 2.9% of the cases (12 out of 414). This inter-relation is, however, of negligible statistical significance (p=0.175). Yet, the multifactor analysis confirmed, that in case of pleomorhic adenoma, the duration of complaints for more than 3 years (p=0.001) and any previous extracapsullar dissection procedure (p=0.016) applied at the removal of the tumor did exert statistically significant impact upon recurrence. Tumor removal via extracapsullar dissection turned out to pose almost a 4 time greater risk of recurrence as compared to the lateral parotidectomy method.
MATERIAL AND METHODS: between 1997 and 2006, 675 patients with non-malignant tumors of parotid gland were treated in a single institution, the tertiary center for ENT at the University Department in Poznań. In the case of 249 patients--extracapsullar dissection was the adopted method of treatment, while in the case of the remaining 426 patients--lateral parotidectomy was performed.
RESULTS: recurrence of tumor was diagnosed in 24 cases: 16 patients were found to have tumor with pleomorphic adenoma, 5--with cystadenolymphoma, 1--with onkocytoma, 1--with lipoma and 2--with monomorphic adenoma. Recurrence most often occurred inter-related with the two most common types of tumors: pleomorhic adenoma in 5% of the cases (12 out of 237) and cystadenolymphoma in 2.9% of the cases (12 out of 414). This inter-relation is, however, of negligible statistical significance (p=0.175). Yet, the multifactor analysis confirmed, that in case of pleomorhic adenoma, the duration of complaints for more than 3 years (p=0.001) and any previous extracapsullar dissection procedure (p=0.016) applied at the removal of the tumor did exert statistically significant impact upon recurrence. Tumor removal via extracapsullar dissection turned out to pose almost a 4 time greater risk of recurrence as compared to the lateral parotidectomy method.