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) Histopathology of the collision tumor showing a focus of metastatic adenocarcinoma (m) adjacent to pituitary adenoma (pa) (H&E, 10x). (B) The metastatic adenocarcinoma displayed pleomorphic cells arranged in papillary architecture (H&E, 10x). Immunohistochemical staining revealed positive staining for (C) cytokeratin 7 (CK7) and (D) thyroid transcription factor-1 (TTF-1).
