Please see my post under Kidney infections from yesterday. We have almost identical symptoms. Read my post and have your daughter see if we have matching symptoms.
Hi
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An elevated D-dimer test apart from indicating a clot in the body could also be high due to recent surgery, trauma, infection, liver disease, pregnancy, eclampsia, heart disease, and some cancers. An elevated D-dimer alone is not significant. It needs to be followed up with other tests. I suggest you consult a cardiologist first and rule out cardiac causes of breathlessness. Then a CT scan of chest should be done. It is difficult to comment beyond this at this stage. Please let me know if there is any thing else and do keep me posted. Take care!