Figure 1. Survival curves for nasopharyngeal carcinoma (NPC) patients with and without retropharyngeal lymph node (RLN) metastasis.
RLN (-): NPC patients without RLN metastasis; RLN (+): NPC patients with RLN metastasis.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.