PMC4293508_01
Magnetic resonance imaging finding of the lumbar spine, sagittal plane.
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F1
Lumbar magnetic resonance imaging (MRI) done at a previous clinic showed otherwise normal (Fig. 1).
Plain hip AP showed a small amorphous calcification near the right anterior inferior iliac spine, which is the attachment site of the rectus tendon, suggesting calcific tendinitis of rectus femoris (A). The lesion was more clearly defined when the patient posed frog leg position (B).
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F2
Additionally, it was more visible in frog leg lateral views around the bony structure (Fig. 2).
Ultrasound scanning over the hip area showing calcification around the rectus femoris with mild fluid collection. AIIS: anterior inferior iliac spine, Ca: calcification, Rf: rectus femoris.
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F3
Fluid collection was also noted (Fig. 3).
Magnetic resonance imaging finding of the hip, axial plane. Calcification was noted in the right rectus femoris tendon showed thickening with small amount of fluid collection at the intermuscular fat plane. White arrow indicates calcification. AIIS: Anterior inferior iliac spine, Rf: Rectus femoris muscle and tendon, S: Sartorius muscle, I: Iliopsoas muscle, T: Tensor fasciae latae muscle, GMx: Gluteus maximus, GMe: Gluteus medius, GMi: Gluteus minimus.
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F4
In the MRI findings, calcification was noted in the right rectus femoris tendon, showing thickening with a small amount of fluid collection and edematous change of peripheral soft tissue (Fig. 4).
Ultrasonography scanning over the hip area, after 6 weeks. Decreased echogenicity of surrounding fat with decreased amount of fluid collection and size was observed.
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F5
She returned to work in a pain-free state and after 6 weeks of follow-up, US image demonstrated decreased echogenicity of surrounding fat and also decreased amount of fluid collection with resolved symptom (Fig. 5).