K.B.
There are many indicators of a neral tube defect as there are many differing levels of damage they can cause. They have found that a diple, or tuff on hair are indicators...but most people with these indicators walk around their wholes lives and never once know they have a problem. Others you find as they start walking and crawling and need some physical therapy. Some have open defects, these cause major problems in development and walking. This would be more than a pit or a dimple but an actual opening. As long as the child is moving the legs around and voiding/stooling ok, and doc. isn't too concerned there is probably not much to worry about.