Hi Everyone! We found an enlarged lymph node on my 4 year old daughter's neck about a month ago while she was fighting a cold. I took her to the doctor because it hasn't went down so the doc did a CBC/platelet test which came back normal and she also did a test called ldh. This came back elevated at 370. Since the ldh test came back elevated we are being referred to an oncologist/hematology. At the time of the test she was also recovering from a black eye. Can a bruise cause an elevated ldh test? We won't get to see the oncologist for another week so I'm freaking out. She has no other symptoms other than enlarged node about the size of a peanut and is soft and moveable.