Presentation
Presented with angular limb deformities since birth.
Patient Data
Right thoracic limb: There is luxation of the elbow joint with no articulation between the radius, ulna, and humerus. The humerus is rotated medially relative to the distal thoracic limb. The first digit originates on the medial aspect of the mid radius and ulna. Digits 2-5 are in a normal position however the second digit is shortened. The phalanges have angular malformations.
Left thoracic limb: There is division of the radius and ulna at the level of the luxated elbow joint. The radius has several carpal bones and a single digit attached. The ulna has a proximal curved malformation, and there are two metacarpal bones and digits distally.
Impression
Bilateral congenital limb deformity with ectrodactyly and elbow luxation.
Case Discussion
Ectrodactyly involves a cleft in the forelimb that separates the metacarpal bones and can also involve the radius. This dog's legs are unequally affected, with the left more severe. The degree of separation and abnormal bone growth has caused instability in the elbows as well.
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