Table I.
Parotid tumours.
| Histologic types | No. of parotidectomies | % |
|---|---|---|
| Pleomorphic adenoma | 70 | 35.4 |
| Warthin's tumour1 | 42 | 21.2 |
| Salivary cyst | 5 | 2.6 |
| Lymph epithelial cyst | 2 | 1 |
| Epidermoid cyst | 2 | 1 |
| Branchial cyst | 1 | 0.5 |
| Mucopapillary cyst | 1 | 0.5 |
| Inflammatory lymphonode | 2 | 1 |
| Sjogren's syndrome | 1 | 1 |
| Lithiasis | 1 | 0.5 |
| Inflammatory degeneration | 1 | 0.5 |
| Masson's tumour | 1 | 0.5 |
| Cystadenoma | 3 | 1.5 |
| Lymph node | 2 | 1 |
| Basal cell adenoma | 1 | 0.5 |
| Haemangioma | 1 | 0.5 |
| Lymphangioma | 1 | 0.5 |
| Fibrosis | 1 | 0.5 |
| Follicular hyperplasia | 1 | 0.5 |
| Chronic cystic hyperplasia | 2 | 0.5 |
| Schwannoma | 1 | 0.5 |
| Oncocytoma | 1 | 0.5 |
| Lipoma | 1 | 0.5 |
| Connective substitution | 1 | 0.5 |
| TOTAL BENIGN LESIONS | 145 | 73.2 |
| Metastasis of skin malignancy 15 squamocellular carcinomas | 172 | 8.7 |
| 1 melanoma 1 Merkel's tumour | ||
| Metastasis of renal malignancy | 1 | 0.5 |
| Adenocarcinomas | 113 | 5.6 |
| Carcinoma on pleomorphic adenoma | 3 | 1.5 |
| Mucoepidermoid carcinoma | 44 | 2 |
| Oncocytic carcinoma | 1 | 0.5 |
| Myoepithelial carcinoma | 1 | 0.5 |
| Neuroendocrine carcinoma | 1 | 0.5 |
| Lymphoma | 6 | 3 |
| Normal parotid gland (associated with neck dissection) | 85 , 6 , 7 | 4 |
| TOTAL MALIGNANT LESIONS | 53 | 26.8 |
| ALL | 198 | 100 |
1 patient underwent bilateral parotidectomy for bilateral Warthin's tumour
Facial nerve neoplastic infiltration was evident preoperatively in 7 cases.
Facial nerve neoplastic infiltration was evident preoperatively in 1 case.
Facial nerve neoplastic infiltration was evident preoperatively in 1 case.
1 patient was submitted to bilateral parotidectomy for suspicious bilateral metastasis of squamous cell carcinoma; histology revealed the carcinoma in only one parotid gland.
1 patient was submitted to parotidectomy with radical neck dissection for head and neck melanoma; histology did not reveal the melanoma in the parotid gland.
A facial nerve deficit was preoperatively due to the neoplastic involvement of the nerve from the zygomatic skin malignancy in 1 case.