<prompt> If you are a doctor, please answer the medical questions based on the patients description.a boy 16 yrs . presents with ho severe headache,irritability,appetite excess or low,occasional heavy perspirationpain abdomen off and on.clinically nothing significant found. invest. mri brain ,cerebral angio ruledout any neuro problem.hemodynamices and thyroid function normal.usg abd. reveales rt. pu junction narrowing with hydronephrosis . what next investigations may be done?what may be the probable diagnosis?pl. reply  <response>: HAI.with most of the stronger investigation done already your neurological, abdominal system look normal.my strong suspicion is regarding juvenile diabetes idem, or any kidney disorder. U can go for these investigations:fasting blood sugars, HAC, post radial levels, serum creatinine, blood urea, Ct pub to rule any obstructionSerum electrolytes, Most probably the diagnosis could be kidney parenchymal disease, relating to diabetes. Good luck take care 