PMC3927033_01
a) Unusual two-layered presentation of VM seen on the US monitor b) Usual US
presentation of VM in a control subject
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PMC3927033_01_jpts-26-165-g001.jpg
fig_001
An unusual morphology was detected by US scan, bilaterally, in a 32 year-old female who was known to suffer from recurrent patellar dislocation (Fig. 1a). A "normal" image is shown for comparison (Fig. 1b).
PMC3927033_02
a) Axial MRI, left thigh. RF rectus femoris, VI vastus intermedius, VL vastus
lateralis, VM vastus medialis. Black arrowhead indicates plane of separation between
VMO (superficial) and VML (deep). b) Control subject. No plane of separation visible
in VM at the corresponding axial level. Abbreviations as in Fig. 2a.
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fig_002
In the subsequent MRI scan, a plane of separation in the belly of VM was found, which is indicated by the arrowhead in Fig. 2a. A control scan at the corresponding axial level is shown in Fig. 2b.