14-year-old mare Mixed Breed
June 1, 2016
2016 Image Interpretation Session - Case 6
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Left Stiflecaption
- Vague and sporadic lameness, difficult to localize.

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Front Limbs
- Left radius – multifocal – high IRU in the mid-diaphysis.
- Right radius – moderate IRU – proximal diaphysis.
- Right humerus – moderate IRU – Proximal and distal diaphysis/metaphysis.
- Left forelimb proximal P1 and distal MC3 – mild IRU
- Proximal palmar cortex of the right MCIII – mild IRU
- Right forelimb pastern – mild IRU
Hind Limbs
- Left femur – moderate IRU – distal cortex
- Left tibia – moderate IRU – proximal cortex
- Right tibia – moderate IRU – distal cortex
- Left Stifle – moderate IRU
- Bilateral hindlimb pasterns and P3 – mild IRU
- The multifocal long bone lesions are consistent with enostosis-like lesions (ELL).
Ahern BJ et al. Enostosis-like lesions in equids:79 cases (1997–2009). JAVMA 2014; 245:1042-1047
O’Neill HD et al. Retrospective study of scintigraphic and radiological findings in 21 cases of enostosis-like lesions in horses. Vet Rec 2011; 168: 326-329
Dyson S. Enigma of enostosis-like lesions in the horse. Vet Rec 2011; 168: 324-325