<s>[INST] why would doctor request LFT for a nine year old? LDH was eleveted on first blood test. His height is 134 cms and he weighs 31 kgs. For past 3 months has had heavy nose bleeds, complains of itching, joint pain, headache, nausea and loss of appetite. [/INST] Hi, dairy have gone through your question. I can understand your concern. His symptoms of itching, nausea, loss of appetite and high LDH suggest some liver pathology like viral hepatitis. You should go for complete liver function test and complete blood count. Then you should take treatment accordingly. Hope I have answered your question, if you have any doubts then contact me at bit.ly/ Chat Doctor. Thanks for using Chat Doctor. Wish you a very good health </s>