I have a history of kidney stones dating back to 1981(approximately 8 visits to the hospital). However, on my urinalysis somethings are very disturbing to me. Listed is Leuk Esterase, POC *trace. It also shows Squamous, Epith,POC (normal range 0-3,3-5) my range is listed as 3-5. The report also states there is a 5mm stone to the proximal right ureter with some mild to moderate hydronephrosis. Could you tell me what the Leuk Esterase, Squamous Epith and hydronephosis are.