A 6-year-old-girl presented with complaints of difficulty in walking for 5 days. Initially, the child started limping on the left side, followed by unable to bear weight; within two days, the right lower limb also got involved and she became non- ambulatory. She also complained of dull aching pain in lower limbs, especially in the upper thigh, more on the left side. There was no history of proceeding febrile illness, trauma or intra- muscular injection. She was completely immunized as per the national immunization schedule. She had tenderness in the left flank, lower back and bilateral thigh.
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