Presentation
Recent injection to the left thigh. Complaining of local pain.
Patient Data
Age: 5 years
Gender: Male
From the case:
Infectious myositis
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At the site of pain pointed by the patient, there is an abnormal muscle echopattern involving vastus intermedius. Approximate Size - 50 x 20 x 12 mm.
There is the presence of edematous (hypoechoic) fibro-adipose septa associated with an anechoic collection of about 10 x 8 mm. Local hypervascularity is present in the affected muscle.
There is no erosion or irregularity of the underlying femoral cortex. Overlying subcutaneous fat shows normal echopattern.
There is no knee or hip joint effusion.
Case Discussion
Findings favor post-injection myositis involving vastus intermedius.
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