Hi doctor, what does it mean when stones are in lower calyx of kidney. If a stone is in lower calyx, does it take time to come out of it?

Dr. Premkumar KrishnappaUrologist21yrs exp

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Each kidney has about 9 to 15 calyces. Divided into 3 parts upper middle and lower depending on their location. Lower calyx stone has less chances of passing out spontaneously because it has to climb up to the level of the middle calyx. This is because the exit from the kidney is from the middle calyx. Stone in upper and middle calyx pass out much easily than the lower calyx stone, provided the size is small enough.  

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