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.
Pure mucinous carcinoma (PMC). (A) Hypocellular type A PMC with abundant extracellular mucin pool. (B) Hypercellular type B pattern. (C) Human epidermal growth factor receptor 2 (HER2)–positive PMC shows high nuclear and histologic grade. There are frequent mitoses (arrows). (D) Some HER2-positive PMC shows extensive signet ring cell differentiation. (E) Some PMC presents a micropapillary pattern. (F) HER2-positive PMC is frequently negative for estrogen receptor.
