Osteitis condensans Ilii as differential diagnosis of sacroiliitis: learning in order not to fail / Osteíte Condensante do Íleo como diagnóstico diferencial de sacroileíte: aprendendo para não errar

Abstract

Osteitis Condensans Ilii (OCI) is a rare benign condition of unknown etiology. The prevalence in overall population ranges from 0.9 to 2.5%, and it is more frequent in multiparous women before the fourth decade of life1. It can be asymptomatic and discovered by accidental radiologic diagnosis or it may present as inflammatory low back pain 1,2. The symptomatic form is an important mimicking factor of sacroiliitis, and it should always be considered as differential diagnosis1. Given the rareness of the disease and the importance of differential diagnosis, we report an OCI case that mimics sacroiliitis