OBJECTIVE. The purposes of this study were to retrospectively review an injection technique, to develop a grading system for evaluation of imaging findings, and to report preliminary outcome related to percutaneous CT-guided steroid injection into the temporomandibular joints of children with inflammatory arthropathy. CONCLUSION. CT-guided steroid injection into the temporomandibular joint of children with inflammatory arthropathy results in clinical and imaging improvement in a substantial proportion of children treated. © American Roentgen Ray Society.