Recent injection to thigh. C/o local pain.
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At site of pain pointed by patient, there is abnormal muscle echopattern involving vastus intermedialis. Approximate Size - 50 x 20 x 12 mm
There is presence of odematous ( hypoechoic ) fibro-adipose septa. There is an anechoic collection of about 10 x 8 mm. There is local hypervascularity in muscle.
There is no erosion or irregularity of underlying femoral cortex. Overlying subcutaneous fat shows normal echopattern.
There is no knee or hip joint effusion.
Findings favor post injection myositis involving vastus intermedius.