my sister has the two pin holes and was born with them. If you also had a fatty tumor at the base of your spine, then you should see a neurologist. My sister finally learned at age 60 that she has spina bifida. She has had restless legs her entire life and numbness and incontenence in the genitals. The pin holes and the fatty tumor are the symptoms of a tethered spine. Look how long it took her to be diagnosed.