<prompt> A 10-year-old obese boy was referred to the emergency with a history of hip pain. He was observed to be limping and complained of severe pain. Which of the following investigation is not required:X-ray of the hipMRI of the hipCT scan of hipUSG of hip  <response>: Order of Investigations in any inflammatory Joint Swelling X-ray MRI Aspiration This patient is an Obese limping child with hip pain, the possible differential diagnosis would be : Osteomyelitis X-MAS Septic ahritis X-MAS Slipped capital femoral epiphysis X-MRI Transient synovitis X-MAS Hence CT will be least preferred. 