Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

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.

View full-text article in PMC

. 2017 Mar 8;30(3):222–229. doi: 10.1177/1971400917694048

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2017

PMC Copyright notice

Figure 1. — Arrows point to nodes of interest. (a) True +: Level 1 b node positive for HNSCC and ECS; observers identify infiltration into adjacent tissues, indistinct nodal margins, and central node necrosis. (b) True −: Level 1 b node positive for HNSCC but no ECS; observers do not identify any ECS criteria. (c) False −: Level 2 positive for 1 cm HNSCC focus and ECS; observers do not identify any ECS criteria. (d) False +: Level 2 node positive for HNSCC but no ECS; observers identify irregular nodal enhancement, infiltration into adjacent tissues, indistinct nodal margins, matted nodes and central necrosis. HNSCC: squamous cell carcinoma of the head and neck; ECS: extracapsular spread.