Could this be Deer Shield?

Could this be Deer Shield?

Observation - Could this be Deer Shield?. Description: Growing on a tree that fell last February I thought at first these were Cramp Balls. They are not like Deer Shield I've seen before but I can't think what else they might be. I've added three photos to show the development of the one I left growing.

Growing on a tree that fell last February I thought at first these were Cramp Balls. They are not like Deer Shield I've seen before but I can't think what else they might be.
I've added three photos to show the development of the one I left growing.