B.W.
My 3 year old fraternal twin sons have a variation on a sacral dimple. It is actually more like extra skin and an extra crease at the top of their gluteal cleft. It kind of looks like a crooked "Y" at the top of their butt crack. They did ultrasounds in the NICU and said both boys' spines were fine. But when they were around 6 months old, they decided to perform an MRI on one of my twins, as he had a more pronounced anomoly than his brother. They wanted to rule out spina bifida. Anyway, they didn't find spina bifida, but they did see a "lesion" on his cerebellum, which two years later they suspect is a low-grade benign tumor. My little guy has to get MRI's every six months! He does fine with the sedation. He is super cranky when he wakes up though and it takes him the whole day to get back to his old self.