Case of the week 12.13.21
Publication Date: 2021-12-13
History
3 month old mixed breed dog. Female intact. Was bitten in the leg by the cat at 6 weeks of age. Concerned for some limb deformity/limb contracture.
3 images
Findings
Lateral and dorsoplantar radiographs of the stifle through pes (3 images total) are available for review.
In addition to the dew claw, there is an extranumerary digit with a fully formed metatarsal bone and two phalanges.
The central tarsal bone is elongated laterally and the 1st tarsal bone articulates with the extranumerary digit. The tarsus is extended in all images.
The remaining skeletal structures are considered normal for the age of the patient. No traumatic skeletal lesions are detected. The imaged soft tissues are unremarkable.
Diagnosis
The appearance of the tarsus is attributed to the patient’s polydactyl conformation. No traumatic skeletal injuries are detected, but soft tissue injuries remain possible.
The extension of the tarsus in all views may be secondary to patient positioning or contracture of the extensor musculature and should be correlated to clinical examination findings.
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