IgG4 Isolated Retroperitoneal Fibrosis and Aneurysmal Periaortitis

Severe constipation was the presentation of an inflammatory disease. A 70-year-old-man with a past medical history of hypertension and prostate cancer in remission presented with 3 months of abdominal pain. His pain was generalized and dull, with an intensity of 8/10, radiating to the back, worse with food intake and lying down. The pain was interfering with sleep. Associated with this he had severe constipation for which he was taking...