BackgroundForelimb extensor tendon rupture (ETR) in foals is sparsely documented.ObjectivesTo describe clinical and imaging findings, treatment details, and long‐term outcome in foals with ETR.Study designMulticentre retrospective case‐series.MethodsClinical record review of foals with ETR, presented to Faculty of Veterinary Medicine at Ghent University (Belgium), the Clinic for Horses at the University of Veterinary Medicine Hannover (Germany), and Rossdales Equine Hospital (UK) between 2009–2021. Long‐term outcome based on structured telephone interview with the owner at the university hospitals and on future ratings from a public racing results archive at Rossdales Equine Hospital.ResultsEight foals (28%; 95%CI: 11.7%–44.3%) presented with ETR only, whereas 21 foals (72%; 95%CI: 55.7%–88.3%) presented with ETR and concurrent flexural limb deformity foals with ETR only were older (median 20 days; Interquartile range [IQR] 13–22) than foals with ETR and flexural limb deformity (median five days; IQR 3–11; p = 0.001). Treatment included medical support, immobilization, and box rest. Hospitalisation time was longer for foals with ETR and flexural limb deformity (median 26 days; IQR 16–44) than for ETR‐only foals (median 11 days; IQR 6–16; p = 0.03). Total rehabilitation time was longer for foals with ETR and flexural limb deformity (median 58 days; IQR 42–91) than for foals without flexural limb deformity (median 32 days; IQR 12–39; p = 0.03). Six foals (21%; 95%CI: 6.3%–35.7%) were euthanased within seven months: three because of problems with limb protraction and progressive flexural limb deformity. Long‐term follow‐up (>18 months) was available for two cases with ETR only, and seven cases with ETR and flexural limb deformity. Both ETR‐only foals had a positive cosmetic outcome but only one a positive functional outcome. Foals with ETR and concurrent flexural limb deformity suffered limitations regarding cosmetic appearance (5/7 negative) and limb function (7/7 negative).Main limitationsSmall sample size, retrospective study, and no clinical follow‐up.ConclusionsETR is a rare condition in this sample of foals treated under hospital conditions often requiring prolonged care, especially with concurrent flexural limb deformity. Further research should investigate potential associations with future athletic performance.
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