14-year-old mare Mixed Breed

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