Idiopathic Retroperitoneal Fibrosis presented as Abdominal Discomfort and Low Back Pain (Ormond's Disease)

We present 45 old male patient presented to the hospital with low back pain and non specific
abdominal discomfort of 2 weeks duration, no urinary or other GI complication, no feature of GI or GU obstruction, abdominal CT show retroperitoneal Para aortic mass at lower aortic root before bifurcation and, elevated C-RP (unfortunately patient has refused to do biopsy), patient has history of amlodipine, patient has very high suspicion of idiopathic retroperitoneal fibrosis.