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.
Tumors and tumor-like lesions were classified histologically as hyperplasia (A and D), papilloma (B and E), microinvasive SCC (C and F), SCC (G and J), spindle cell tumor (H and K), or anaplastic tumor (I and L). Original magnifications: ×40 (A–C, G–I); ×200 (D–F, J–L).
