Elder Tree Branches Stripped

Question

I have an old elder tree which has one or two strong branches which appear to be stripped of bark. What is the reason for this? At the base about 5 new shoots of about 5 ft have appeared with flowers budding. The tree has recently been pruned.

Answer 1

The stripped bark could be cankers. Here is info about those.
https://www.gardeningknowhow.com/ornamental/trees/tgen/cankers-on-trees.htm

I would remove the suckers. Pruning can stimulate the production of suckers.