Presentation
Footballer complains of snapping and pain in left thigh whilst playing
Patient Data
Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.
Note bull's eye sign of ruptured deep tendon of rectus femoris. This is best seen on axial sections.
Coronal plane shows the deep tendon leading into the region of the tear, where there is a wavy contour of the deep tendon with surrounding edema.
Case Discussion
The rectus femoris has two separate origins, the direct head originates from the anteroinferior iliac spine and indirect head from the superior acetabular ridge. Both these heads unite to form the deep musculotendinous junction.
The "bull's eye sign" was a term coined by Hughes et al to represent increased signal around the deep musculotendinous junction, which is thought to represent an intramuscular degloving injury of the muscle fibers from the indirect head, while the peripheral direct head fibers remain intact.
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