“…However, with the decreasing prevalence of tuberculosis, iliopsoas abscess has become uncommon, and Crohn's disease is the commonest cause of secondary iliopsoas abscess [3,6]. In addition, psoas abscess secondary to XGP is uncommon, and just a few cases are described in the literature [2,3,7,8]. The clinical presentation of iliopsoas abscess is often variable and non-specific, the classical clinical triad consisting of fever, back pain, and limp is present in only 30% of the patients [6].…”