In all cases of ununited anconeal processes the medial coronoid should be evaluated since approximately 20 % of dogs with UAP will also have FCPs. (ucah.ca)
A: I am under the impression that surgery for elbow dysplasia is pretty unlikely to help unless it is done in the very early stages of the disease and there is a contributing cause like an united anconeal process. (vetinfo.com)
The most common causes of elbow pain in young dogs are elbow dysplasia, where fragments of bone (medial coronoid process) are present in the elbow joint and un-united anconeal process where a portion of one of the bones that forms the elbow fails to fuse. (2ndchance.info)