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.
Histopathology of UIP (higher power). A hallmark of UIP is the heterogeneity, represented by dense, acellular bundles of collagen with smooth muscle metaplasia (arrow) in close approximation to the fibroblastic focus (FF), a dense collection of fibroblasts and myofibroblasts. Cuboidal epithelial cells lining distorted airspaces (which may be undergoing apoptosis) are seen overlying the fibroblastic focus
