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  • Title: Intra-articular inclusions of the elbow joint complex.
    Author: Mercer SR, Bogduk N.
    Journal: Clin Anat; 2007 Aug; 20(6):668-76. PubMed ID: 17415721.
    Abstract:
    An abundant clinical literature implicates intra-articular inclusions in various pathological conditions of the elbow, but the anatomical literature offers piecemeal descriptions of these structures. The aim of this study was to determine the prevalence, disposition, and gross morphology of intra-articular inclusions of the entire elbow joint complex. Twenty-eight elbow joints from 17 adult embalmed cadavera were studied by macrodissection. Three types of inclusions were identified. Fat pads and fibroadipose meniscoids were found in all joints while capsular rims occurred in 50% of radiohumeral and humeroulnar joints. Fat pads were located opposite the olecranon, coronoid, and radial fossae. Fibroadipose meniscoids were found in the nonarticular waists of the trochlear notch and protruded into the posterolateral aspect of the radiohumeral joint. Fibroadipose meniscoids and fat pads are characteristic structures of the elbow joint complex. Fat pads appear to act as deformable space fillers, while the radio-humeral fibroadipose meniscoid appears to protect articular cartilage exposed during normal movement. Arguments are raised whether these structures may act as the nidus for arthrofibrosis and that the radiohumeral meniscoid may be involved in lateral epicondylalgia.
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