Lactate dehydrogenase ( LDH) is found in many of the body's tissues and organs. It is mainly used to help identify the location and severity of tissue damage in the body. The NHS website has some information about the test here.
I'm afraid we can't tell you what a level of 475 means for you. This has to come from your medical team. Hopefully,they will be able to explain this in more detail for you.
