I'm not a radiologist, nephrologist, or medical professional of any nature, but I had a thought connecting some symptoms and thought I'd get some input.
I recently passed a rather large kidney stone with the help of extracorporeal shockwave lithotripsy and Flomax. During the treatment for the stone, it was discovered that I have cysts on both kidneys. Apparently they are benign and are not causing any renal function problems. However, there are a lot of them, and they seem large.
The doctor showed me the CT scan of my cysts. I could swear that at least one of them appeared larger than the kidney itself. That cyst appeared to have a cyst of its own, and there was some calcification between them, which is what made my doctor request the CT scan.
I've also had some problems with fecal urgency for a number of years. The most notable symptom is that I frequently feel the need to go within a half hour of eating. It might actually be position dependent, too. I seldom have the problem when I'm walking around after eating, but frequently have it when sitting after eating. When this happens, it's sometimes a little loose, sometimes not, but never what I'd really call diarrhea. The stools seem of a normal volume. This problem significantly reduced in severity after my first lithotripsy. Until then, I'd always assumed it was more of a problem with my diet (which is admittedly not very good). The reduction in severity was mostly marked by both hemorrhoids and their related symptoms, and a feeling of incomplete voiding, diminishing to near absence in the span of a few days.
I also have a near-constant very mild pain in my left side, an inch or so below my ribcage and just barely toward the front (anterior/ventral/belly). I've probably lived with this for many years. It's so mild that I don't think about it most of the time, and generally only notice it when I think about it. It's kind of like very mild gas pain or maybe that I ate something a little too spicy.
Anyway, what I'm thinking is that that huge kidney cyst might be constantly pressing on something in my abdomen, probably my descending colon, and that as food enters my lower stomach, the stomach presses on the kidney, which in turn presses more on the colon, causing my fecal urgency.
Does anyone think that this sounds even vaguely reasonable? Should I talk to my urologist again, or would I be better off talking to a gastroenterologist? Or am I being a hypochondriac?