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) Magnification 400x, hematoxylin and eosin stain of the left neck; Merkel cell carcinoma primary tumor demonstrates numerous mitoses and neuroendocrine nuclei. (b) Magnification 200x, MCC left neck primary highlighting lymphovascular invasion. (c) Magnification 400x, immunohistochemistry demonstrates perinuclear dot-like immunostaining positive for cytokeratin 20. (d) Magnification 40x, MCC primary tumor of the left neck in subcutaneous tissue.
