<s>[INST] hi, my son was found to have blood, protein and mucus threads in urine sample at urgent care center, looking back one year ago, his urine had similar findings. we were told to follow up with urology, possibly nephrology. i am wondering what could be an underlying cause of this and is it serious and should i be concerned? [/INST] yes u shud be concerned get ur child checked by a urologist first after getting an ultrasound scan and blood workup </s>