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.
(A) Carcinoid tumors with different degrees of cellularity of various sized solid nests of tumor cells. The islands are relatively closely packed and a marked tissue retraction artifact is present. Carcinoid tumors invaded the muscularis propria. (B) Higher magnification of the lesion shown in solid nests as well as glandular structures. Some cells have large nuclei and small nucleoli as well as inconspicusous cytoplasm and fine chromatin (Haematoxilin-eosin staining).
