10. 24, 46, 49, 53, 65

So, what happens to the calcium that has been leaking out of my bones--or the dietary calcium that isn't being getting into the bones in the first place? Parathyroid (PTH) and calcitonin hormones dictate a narrow range for blood calcium levels, critical for calcium's numerous roles, which include clotting mechanisms, hormone release, and muscular nerve transmission.  

Extra calcium would interfere with these tasks, so the kidney diverts extra calcium into the urine, too much in my case. When the concentration of dissolved urine calcium gets too high, the opposite of dissolve occurs: precipitation. Stalagtites, crystals, hail, kidney stones, all examples of precipitation.

Kidney stones can block the ureter, leading painful or not so painful spasms, and causing a back-up of urine upstream to the kidney--not good because that back-up creates pressure on cells, a potentially deadly process.  

24, 46, 49, 53, 63, 65: ages when I experienced kidney stones, all spontaneously passed until the most recent, which required a laser blasting. Done under general anesthesia, the most difficult part of the procedure was the temporary (about two weeks) placement of a stent: a tube inserted inside the ureter to prevent kinking and blockage by postop swelling or by a remnant of the stone.  More annoying than painful, and associated with markedly increased frequency, I decided to have it removed before a 3 week overseas trip. Been okay in the 9 months since then. I did okay