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.
Histological picture (a) of the surgical specimen shows many, variably sized, thin-walled vascular channels lined by endothelial cells with interposed nerve fibers (black arrows) (H and E, original magnification ×20). Immunohistochemical staining (b) for neurofilament protein highlights the nerve fibers interspersed among the vascular spaces. The lesion was also positive at S-100 staining (not showed) (original magnification ×20)
