In horses, by what age are most osteochondrosis lesions diagnosed?

In horses, by what age are most osteochondrosis lesions diagnosed?

• A. 3 months
• B. 7 months
• C. 12 months
• D. 24 months

Answer: (B)

Most osteochondrosis lesions in horses are first detectable during early development, when radiographs are commonly used to screen foals. As the foal grows, cartilage and the articular-epiphyseal complex undergo changes that reveal irregularities on radiographs, and this tends to become evident around seven months of age. This is why seven months is the typical time point for diagnosis: the joints are transitioning from rapid growth, cartilage is still thick enough for radiographic signs to appear, and routine screening at this age often uncovers lesions such as fissures or osteochondral fragments. At three months the changes may be too subtle to see yet, while waiting until twelve or twenty-four months delays detection and can miss the window for early management.

Most osteochondrosis lesions in horses are first detectable during early development, when radiographs are commonly used to screen foals. As the foal grows, cartilage and the articular-epiphyseal complex undergo changes that reveal irregularities on radiographs, and this tends to become evident around seven months of age. This is why seven months is the typical time point for diagnosis: the joints are transitioning from rapid growth, cartilage is still thick enough for radiographic signs to appear, and routine screening at this age often uncovers lesions such as fissures or osteochondral fragments. At three months the changes may be too subtle to see yet, while waiting until twelve or twenty-four months delays detection and can miss the window for early management.