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.
Distribution of area ratio with respect to nuclear size in different tumor grades. The distribution of Grades III and IV tumors shows substantial shift-to-the-right, whereas the distributions of Grades I and II tumors are centered on a nuclear size of 6 μm. This distribution supports a two-tiered grading scheme
