multiseptated cystic lesion on/near ovary in 8 mo. old female

We were just told our daughter has a multiseptated cystic lesion on/near her left ovary.  We are going for a catscan next week but our surgeon's appt isn't until mid August.  The waiting is killing us!  If anyone has any idea what this could potentially be, PLEASE let me know.  I am looking for any ideas!  If more info needed respond to question and I will post again.  She is 8 months old now and is relatively healthy besides this.  It was found on the first ultrasound that we had when they were looking for possible bladder reflux (which she ended up having).  This is the second ultrasound done to look at the cystic mass and they can't figure out what it is and exactly where it is.  It was first seen as 2.4 cm and now it measures 3 cm only 12 days after the first ultrasound.  If anyone out there can point me in the right direction I would appreciate it!