calcium oxalate stones, struvite stones, uric acid
stones or cystine
stones. Potassium citrate is used for the
treatment of
stones. I would suggest you to get an evaluation done from a urologist to determine the type of stone. Treatment modes include Extracorporeal Shock Wave Lithrotripsy (ESWL), uteroscopic stone removal and percutaneoud nephrolithotomy.
For the echogenic mass, further investigations like kidney function tests and CT kidney, urinary bladder should be done.