“…Infection of the sacroiliac joint is uncommon, representing 1-2% of septic arthritis cases. The predisposing factors for phylogenic sacroiliitis include parenteral drug abuse, systemic sclerosis, pregnancy, immunosuppression, trauma, hemoglobinopathies, diabetes mellitus, HIV infection, cancer, endocarditis, alcohol abuse, and skin, respiratory or genitourinary infections [1][2][3]. Differential diagnoses include pelvic abscess, lumbar disc herniation or septic arthritis of the hip, and misdiagnosis is common [2].…”