Presentation
History of vaccination Injection in the thigh five 5 days back. Complaining of fever and local thigh pain for the last one day.
Patient Data
Age: 5 yrs
Gender: Male
From the case:
Post injection myositis - thigh
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The vastus lateralis muscle belly shows an ill-defined area of hypoechoic echo pattern, outward bulging of fibro adipose septa. No floating echoes. Approximate size - 60 (craniocaudal) x 25 (transverse) x 20 mm (anteroposterior) mm. Local hypervascularity present. No femur cortical erosion/ subperiosteal collection. No extension into other muscles. No thrombosis of the femoral artery.
Case Discussion
Findings favor post-injection vastus lateralis myositis without abscess formation.
A companion case shows a post-injection abscess of the thigh in a pediatric patient: https://doi.org/10.53347/rID-32906
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