What is CD34?
CD34 is a protein normally produced by the cells inside blood vessels, immune cells, and supporting cells. It can also be produced by tumour cells. Pathologists use a test called immunohistochemistry to see cells producing this protein under the microscope.
Normal types of cells that produce CD34
- Endothelial cells – These are the cells that line the inside of blood vessels throughout the body.
- Hematopoietic progenitor cells – These are immature cells that will later become part of the immune system.
- Fibroblasts – Fibroblasts are found all over the body. They are support cells that help hold the body together. They also help heal the body after injury.
Non-cancerous tumours that produce CD34
Types of cancers that produce CD34