Reading what other's have experienced, could also cause fear, but yes, they are found outside the digestive tract. Miss H, had one under the skin on her butt cheek. She painted it with iodine, but here's her story and pic of it. http://www.curezone.com/forums/fm.asp?i=1292468#i
BTW- The Mayo clinic came out in 1999 and said almost always, sinus infections are fungal, not bacterial, so all the antibiotics they give people for sinus infections, doesn't work for hitting fungi, plus causes further problems with the digestive tract later.