Summary
Objective: To describe the radiographic, ultrasonographic, computed tomography (CT), magnetic
resonance imaging (MRI), and arthroscopic findings in eight dogs with elbow lameness
caused by primary flexor enthesopathy.
Study design: Clinical study.
Animals: Eight client-owned dogs.
Methods: In all dogs, lameness was localized to the elbow by clinical examination. Radiographic
examination, ultrasound, CT and MRI were performed prior to arthroscopy. In seven
dogs, surgical treatment and subsequent histopathology were performed.
Results: Primary enthesopathy of the medial epicondyle was diagnosed in eight dogs (13 joints)
by combining the minimal radiographic changes with specific ultrasonographic, CT,
MRI and arthroscopic findings at the medial epicondyle. In all joints, any other pathology
could be excluded. Histopathology of the affected tissue revealed degeneration and
metaplasia in the flexor muscles.
Conclusions: Primary flexor enthesopathy at the medial epicondyle is an unrecognized condition
and is a possible cause of elbow lameness in the dog. Diagnosis is based on specific
imaging and arthroscopic findings.
Clinical relevance: The most important cause of elbow lameness in dogs is medial coronoid disease. Often
this condition presents with minimal radiographic and arthroscopic changes. In these
cases, primary enthesopathy of the medial epicondyle should be considered as a differential
diagnosis, in order to make the correct treatment decision.
Keywords
Elbow - dog - medial epicondyle - flexor enthesopathy - diagnosis