Has anyone elses infant been diagnosed with pyloric stenosis?

My son was diagnosed at 8 wks with pyloric stenosis. His symptoms were projectile vomiting, brown vomit, lack of bowel movements, and overall fussy. We had been to the hospital 3 times before and they told us reflux disease, so we finally went to another hospital and they took an xray of his tummy, then an ultrasound. The muscle at the bottom of his stomache had grown so large it was actually cutting off the flow of food to his bowels. I started a group called infant pyloric stenosis, and I just want to know how may other parents have sons and daughters with doented cases.