Presentation
Left thigh trauma during football playing.
Patient Data
A complete tear of the indirect head of the rectus femoris is present at the left thigh middle third region.
There is also edema surrounding the proximal muscle near to its origination.
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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