Post injection myositis
H/o vaccination Injection in thigh - 5 days. C/o fever and local thigh pain - 1 day.
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An ill-defined area of vastus lateralis muscle belly shows hypoechoic echopattern, outward buldging of fibroadipose septa.
No Floating echoes are noted.
- Craniocaudal - 6 cm
- Transverse - 2.5 cm
- Anteroposterior - 2 cm
Dopplar - shows local hypervascularity .
It does not abutt femur cortex. NO femur erosion / periosteal reaction is noted.
No extension is noted in to other muscle.
No thrombosis of femoral artery is noted.
Findings favor post injection vastus lateralis myositis without abscess formation.