How can you assess for an active pars fatigue fracture on MRI?

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How can you assess for an active pars fatigue fracture on MRI?

Active pars interarticularis fatigue fracture shows up on MRI as localized bone marrow edema within the pars interarticularis, best seen on fluid-sensitive sequences like STIR or fat-saturated T2. This edema signals an acute or evolving stress reaction in the pars, pointing to an active fracture process. Sometimes you may also see a fracture line, but the edema is the most sensitive and reliable sign of activity. Other findings such as joint effusion, osteophyte formation, or disc dehydration do not specifically indicate an active pars fracture; they reflect other, non-fracture processes like facet joint inflammation, degenerative changes, or disc degeneration.

Active pars interarticularis fatigue fracture shows up on MRI as localized bone marrow edema within the pars interarticularis, best seen on fluid-sensitive sequences like STIR or fat-saturated T2. This edema signals an acute or evolving stress reaction in the pars, pointing to an active fracture process. Sometimes you may also see a fracture line, but the edema is the most sensitive and reliable sign of activity. Other findings such as joint effusion, osteophyte formation, or disc dehydration do not specifically indicate an active pars fracture; they reflect other, non-fracture processes like facet joint inflammation, degenerative changes, or disc degeneration.

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