What are possible causes?

[cherryberry918]

less than 10 years old female
recently diagnosed with hypertension.
Nov 12 AST 41, ALT 26, alkaline phosphatase 198,
Nov 5 AST 25, ALT 13, alkaline phosphatase 225,
Nov 1 AST 24, ALT 14, alkaline phosphatase 202.
Nov 6 24hr urine - VMA 13, creatinine 21.9
Nov 5 EKG, Echocardiogram, chest x-rays - unremarkable
Nov 9 ultrasound kidneys and renal arteries, whole abdomen - unremarkable
Nov 12 computed tomography whole abdomen - unremarkable
What might the next steps be in determining cause? Thank you very much

[cherryberry918]

pediatric nephrologist does not know what's wrong and says enough tests have been done - thank you for all replies, brainstorming is important to try to get to the core

[cherryberry918]

healthy, active lifestyle, not overweight  - likes to eat vegetables, especially fresh - eats a balanced diet and plays outdoors daily also enjoys reading, board and card games, very discrete and limited use of online games - strong, quick learning physically and intellectually

[drd4u]

there is need to rule out causes which might relate to lifestyle,therefore let the child do lipid profile tests. also it might be essential hypertension.