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Hi there,This is Dr Basu, experienced Internal Medicine Specialist. I am here to address your concerns and provide great service.
Exercises can cause rising LDH.
Another common cause can be lymph node infection --also can raise LDH.
Usually not a malignancy.
However the lymph node can be checked with a FNA biopsy.Best wishes,It was my pleasure to help you today.If I have answered all your questions, Please rate my response Excellent (click on the 5th star).Please bookmark my profile for fast, reliable and authentic answers!This is the link to my profile:http://www.justanswer.com/medical/expert-mysticdoc/