Background info. This is Ruby, she is a 4 year old female bullmastiff. when Rubys mother, Mabel, was 18 days into her gestation with Rubys litter she had something called Fibrocartilaginous emboli. The initial treatment consisted of IV corticosteroids(sp?). She ended up making a full recovery. The steroids given at that particular time in gestation showed itself when the litter was whelped. Out of the 8 pups whelped 4 had to be euthanized due to severe cleft pallets(17-21 days gestation is when the pallets form and the steroids affected their development). Of the remaining 4 puppies 2 had umbilical hernias..1 repaired itself the other was repaired during the castration surgery. Ruby was not spayed until age 2..But had never had a heat cycle. This "lump" is very hard and boney and is not painful. It originally showed up when Ruby was about 6 months old(it has never gone away), she had a trip to the vet..x rays..inconclusive. The next step suggested to us was an assessment by a specialist at the university of guelph..cost..2000.00 to walk in the door(any tests would be extra). we opted out of that and figure we would see how it progressed and decide from there. She is healthy as a horse besides this bump. It doesn't seem to cause her any troubles. My gut Feeling is this is somehow related back to the steroids she was exposed to inutero...The vet doesn't think so but has no better explanation for it. Just thought I would post a pic and see if anybody else had any ideas or may have seen something similar before. Ruby is a great dog!