A week after taking ural medicine(for 15 days) for removal of small kidney stone , I had my kidney ultrasound and no stone was seen but my urinalysis shows that I have fine granular cast (0-2/lpf), few amorphous PO4, few squamous, few bacteria, few mucus threads, RBC (0-2/hpf), pus cells(0-2/hpf), trace albumin , sugar negative, urine PH 8.0 ,Sp. Gr. 1.005. Serum creatinine (0.89 mg/dl)(norm 0.67-1.17), BUN (8.15 mg/dl) (Norm 6-20), AST 31 (norm up to 40), ALT 32 (norm 0-41)
Hello, Welcome to Chat Doctor, I am Chat Doctor.  Firstly, granular cast may be found in many conditions like in case of urinary tract infection, chronic kidney disease, blood in urine, and others.  As, your renal function test (Creatinine, BUN, ) and liver enzymes are within normal limit, the possibility of a chronic kidney disease is ruled out.  As RBC and Pus cells in urine are within normal limit, the possibility of any infection and blood in urine are ruled out.  So, over all, the finding is due to the previous history of stone.  You do not need to worry.