Ultrasound Guided Intra-sacroiliac Joint Injection: Methylprednisolone Versus Triamcinolone

Inclusion Criteria: * Age between 50 - 70 years of both gender, * sacroiliac pain with at least 3 of the 5 provocative tests are positive, * pain did not relieved by the conservative therapy (rest, ice/heat, topical menthol, lidocaine patch, pelvic belt, physical therapy and NSIAD) for 4 weeks, * positive diagnostic test 2 ml lidocaine 2% intra-articular SIJ injection one day before the procedure are included in this study. Exclusion Criteria: * The exclusion criteria are patient refusal, * history of immunosuppression diseases, * bleeding or coagulation disorders, * sacroiliac pain of multiple sources, * local skin infection, * septic joint, osteomyelitis, * renal patients (Serum Creatinine \>1.8 ), * decompensated liver diseases, * local malignancy, * psychiatric disorders affecting co-operation, * previous history of chronic opioid use, * intra articular sacroiliac injection within previous three months, * negative diagnostic test, * allergy or hypersensitivity to any of the study medications * diabetes mellitus, type II with history of poor glycemic control * morbid obesity ( BMI\> 40 ).