Unfortunately «elbow displaysia» was the name given to the condition of ununited anconeal process and this term is closely linked in this way in the minds of most veterinarians and some dog breeders. (siriusdog.com)
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)
The four types of elbow joint problems include ununited anconeal process (UAP), fragmented coronoid process (FCP), osteochrondrosis dissecans (OCD) and «elbow incongruency.» (healthypets.mercola.com)