Catherine has an inguinal hernia, diagnosed by mom. It only took two different pediatricians, a botched time-waster ultrasound, and a visit to the surgeon to finally get positive confirmation of my diagnosis.
Fortunately the visit to the surgeon today was very reassuring. It's fairly unlikely to cause a problem, and even though it won't correct itself, we can take our time and have it corrected when she's a bit bigger and it's a convenient time for us. The surgery itself is reasonably minor and recovery should only take a few days. I'd just as soon wait until she's a little bit bigger than 33 pounds dripping wet, thanks.