From: The value of CT, MRI, and PET-CT in detecting retropharyngeal lymph node metastasis of head and neck squamous cell carcinoma
Primary site
Among 123 patients
No. (%)
Among 43 RPLN positive patients
Oral cavity
7 (6%)
4 (9%)
Oropharynx
66 (54%)
27 (63%)
Hypopharynx
48 (39%)
12 (28%)
Larynx
1 (1%)
0
Sinonasal