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{
    "pk": 35492,
    "title": "Closed Sagittal Band Injury from a Low-Energy Impact: A Case Report.",
    "subtitle": null,
    "abstract": "One of the three components of the dorsal extensor hood, the sagittal band is a sheet of connective  tissue  that  provides  lateral  stability  to  the  extensor digitorum tendon  at  the metacarpophalangeal joint.  Rupture  of  one  of  the  two  portions  of  the  sagittal band  can  lead  to contralateral subluxation or dislocation of the extensor tendon. Closed sagittal band injury is commonly associated with high-energy impact or inflammatory conditions, such as rheumatoid arthritis. In cases of high-energy  impact,  a  closed sagittal  band  injury  may  co-occur  with  a “boxer’s  knuckle,” the metacarpophalangeal joint and the extensor mechanism injury that has been historically reported in boxers after blunt impact to the joint in forceful flexion. In this case report, we present a 64-year-old woman with no known history of rheumatoid arthritis and with a closed sagittal band injury received while using the fists to support changing her body position in bed. Ultrasonography and MRI are useful in the evaluation of a sagittal band injury. The use of dynamic ultrasound imaging can help visualize the extensor tendon subluxation with metacarpophalangeal joint flexion and confirm the diagnosis of sagittal band injury.",
    "language": "en",
    "license": {
        "name": "Creative Commons Attribution 4.0",
        "short_name": "CC BY 4.0",
        "text": "Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.\n\nNo additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.",
        "url": "https://creativecommons.org/licenses/by/4.0"
    },
    "keywords": [
        {
            "word": "sagittal band"
        },
        {
            "word": "extensor tendon injury"
        },
        {
            "word": "boxer's knuckle"
        },
        {
            "word": "metacarpophalangeal joint"
        }
    ],
    "section": "Articles",
    "is_remote": true,
    "remote_url": "https://escholarship.org/uc/item/5pv1j0b3",
    "frozenauthors": [
        {
            "first_name": "Jonathan",
            "middle_name": "",
            "last_name": "Lin",
            "name_suffix": "",
            "institution": "David Geffen School of Medicine at UCLA",
            "department": "None"
        },
        {
            "first_name": "Johnathan",
            "middle_name": "",
            "last_name": "Chen",
            "name_suffix": "",
            "institution": "David Geffen School of Medicine at UCLA",
            "department": "None"
        }
    ],
    "date_submitted": "2019-10-29T02:06:54+01:00",
    "date_accepted": "2019-10-29T02:06:54+01:00",
    "date_published": "2021-01-20T09:00:00+01:00",
    "render_galley": null,
    "galleys": [
        {
            "label": "",
            "type": "pdf",
            "path": "https://journalpub.escholarship.org/ucla_rsp/article/35492/galley/26421/download/"
        }
    ]
}