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.
Squamous cell carcinoma in animals treated with (S)-NNN. Plate A shows squamous cell carcinomas involving both the soft palate (short arrow) and tongue (long arrow); corresponding histology showing invasion of soft palate is shown in plate B (bar = 500 µm). Plate C shows another squamous cell carcinoma involving the tongue, and corresponding histology showing invasion of underlying skeletal muscle is shown in plate D (bar = 500 µm).
