Unilateral polydactyly in two foals

Abstract

Summary This case report describes unilateral supernumerary digits of the forelimb in two foals. A diagnosis of polydactyly of the right forelimb in one case and of the left forelimb in the other was made by clinical examination and radiographic interpretation. Surgical excision was performed under general anaesthesia with a good cosmetic and functional outcome in both cases.

Considerations for surgical correction of polydactyly in horses

“…The current report by Gray et al . () is the first reported use of both cross‐sectional imaging and ultrasound to evaluate the polydactyly in horses. While its use post‐operatively in the current report was interesting, the use of these advanced imaging modalities preoperatively are highlighted by their findings.…”

“…However, as described in the current report by Gray et al . () and above, in the atavistic form, there is usually one normal digit and one smaller digit not in contact with the ground, thus surgical removal of the extra appendage is usually possible ( Fig ). Advanced imaging preoperatively in these cases can help identify the highly variable anatomy of polydactyl horses.…”

“…By far, the most widely reported surgical technique is the approach described by Gray et al . () where a circumferential skin incision is made around the supernumerary digit and a combination of sharp and blunt dissection is used to expose the attachments of the metacarpal bones. The periosteum is incised and elevated and an osteotomy performed to amputate the affected digit.…”

“…In the case report by Gray et al . (), two cases of polydactyly in foals are well described with both post‐operative cross‐sectional imaging and long‐term follow‐up available for one of the two foals. As summarised in this report, polydactyly is a rare congenital abnormality in which an extra appendage is present.…”