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.
The whiteness of crypt openings (HE, × 100). A: "White-edged dark spot" crypt openings (COs) (a round dark spot bordered by white); B: Histological image of "white-edged dark spot" COs; C: "White" COs (pure white COs without a dark spot); D: Histological image of "white" COs; E: "Dense white pit" ("DWP") COs (densely white COs resembling snowballs); F: Histological image of "DWP" COs.
