Rectus femoris injury: bull's eye sign

Case contributed by Dr Prashant Gupta


Football player complains of snapping and pain in left thigh while playing.

Patient Data

Age: 23
Gender: Male

Note bull's eye sign of ruptured deep tendon of rectus femoris. This is best seen on axial sections.

Case Discussion

The rectus femoris has two separate origins, the direct head originates from the antero- inferior 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.

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Case information

rID: 16621
Case created: 3rd Feb 2012
Last edited: 14th Dec 2016
Inclusion in quiz mode: Included

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