Lymph Node Metastases in Parotid Cancer

 

data from Leibel and Phillips

intraparotid and subcapsular periparotid nodes
Incidence of Clinically + Node Metastases by Histology
Histology % positive nodes
anaplastic 86%
epidermoid 21%
adenocarcinoma 22%
mucoepidermoid 14%
malignant mixed 16%
acinic 2%
adenoidcystic 2%
oncocytoma 0%
All 14%

Incidence of Occult Node Metastases
Histology % occult node metastases
epidermoid 41%
adenocarcinoma 18%
mucoepidermoid 14%
acinic 4%
adenoidcystic 4%
anaplastic 1/1
malignant mixed 0%
oncocytoma 0%
All 12%

Incidence of Occult Node Metastases by Grade
Tumor Grade % occult node metastases
low 2% (2/125)
intermediate 14% (13/96)
high 49% (29/59)