Septic arthritis of the hip joint
Right hip pain and limitation of movement. History of recent chest infection
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Irregularity of the right femoral epiphysis as well as abnormal marrow signal of the right femoral epiphysis and opposing acetabular surface displaying low signal in T1 and bright signal in STIR/T2 FATSAT due to marrow edema. There is loss of joint space at the superior aspect of right hip joint with moderate joint effusion.
Diagnosis: Septic arthritis of the right hip joint
This case represents radiological emergency. Any hip joint effusion in a child should be immediately aspirated by Ultrasound guidance to avoid joint destruction. Septic arthritis of the hip joint represents significant cause of disability especially in developing countries. The patient had recent chest infection and septic hip infection developed by hematogenous spread.