2009年1月1日 · Incomplete ossification of the humeral condyle (IOHC) has been reported as an uncommon cause of forelimb lameness in dogs but may be an important risk factor for humeral condylar fractures (Denny, 1983; Anderson et al, 1990; Marcellin- Little, et al, 1994).

What is a humeral condylar fissure (crack)? The humeral condyle (Incomplete Ossification of the Humeral Condyle (IOHC)) is the name given to the end of the bone (called the humerus) at the top of the front leg (the forelimb).

Dogs with IOHC may present with lameness, condylar fractures secondary to IOHC or as an incidental finding in non-lame dogs. Dogs with fractured condyles are treated with appropriate internal fixation. While the epicondylar ridges tend to heal if stability is provided, the intracondylar region may never heal.

Incomplete Ossification of the Humeral Condyle (IOHC) is characterised by the presence of a fissure between the medial and lateral condyles of the humerus, which corresponds to the location of the cartilagenous plate that separates the two ossification centres prior to their fusion.

Results: Nineteen dogs (95%), all Spaniel breeds, had either bilateral IOHC demonstrable as a saw-toothed intercondylar complete or incomplete hypoattenuating defect with hyperattenuating margins, or IOHC with contralateral humeral condylar fracture (HCF). Joint incongruity values for IOHC were compared with those of normal elbows.

Results: Incomplete ossification of the humeral condyle was present in six of 14 dogs, however IOHC was incomplete in three of the six affected dogs. Plain radiographs had a sensitivity of 0.83 (CI 95%: 0.36 to 0.99) and specificity of 1 (CI 95%: 0.60 to1).

2008年4月3日 · Results— Nineteen dogs (95%), all Spaniel breeds, had either bilateral IOHC demonstrable as a saw-toothed intercondylar complete or incomplete hypoattenuating defect with hyperattenuating margins, or IOHC with contralateral humeral condylar fracture (HCF). Joint incongruity values for IOHC were compared with those of normal elbows.

IOHC in dogs occurs where the base of the humerus meets the radius and ulna which forms the elbow joint. It is the base of the humerus that fractures. The diagram below shows the joint itself. The cause of IOHC is unknown but there is suspected to be an hereditary component.

2014年8月23日 · IOHC • Classically, present with lameness or HCF at mean age = 6 yrs (range 2-12) • Some reports suggest obesity as a risk factor • All dogs w/ IOHC are bilaterally affected per Dr. Marcellin

Dogs with IOHC have an abnormal humeral condyle and slowly develop degenerative joint disease in affected elbow joints; may not fracture elbow joints until adult.