A review of terminology for equine Juvenile OsteoChondral Conditions (JOCC) based on anatomical and functional considerations.

J.M. Denoix*, L.B. Jeffcott, C. W. McIlwraith, P.R. van Weeren

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    Abstract

    This manuscript describes a new classification of the various joint-related lesions that can be seen in the young, growing horse based on their anatomical and functional aetiopathogenesis. Juvenile osteochondral conditions (JOCC) is a term that brings together specific disorders according to their location in the joint and their biomechanical origin. When a biomechanical insult affects the process of endochondral ossification different types of osteochondrosis (OC) lesions may occur, including osteochondral fragmentation of the articular surface or of the periarticular margins, or the formation of juvenile subchondral bone cysts. In severe cases, osteochondral collapse of the articular surface or the epiphysis or even an entire small bone may occur. Tension on ligament attachments may cause avulsion fractures of epiphyseal (or metaphyseal) ossifying bone, which are classified as JOCC, but do not result from a disturbance of the process of endochondral ossification and are not therefore classified as a form of OC. The same applies to ‘physitis’ which can result from damage to the physeal growth plate.
    Original languageEnglish
    Pages (from-to)29-35
    Number of pages7
    JournalVeterinary Journal
    Volume197
    Issue number1
    DOIs
    Publication statusPublished - Jul 2013

    Keywords

    • Horse
    • Osteoarticular system
    • Osteochondrosis
    • Juvenile disorders
    • Aetiopathogenesis
    • Biomechanics

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