Case Report : Idiopathic retroperitoneal fibrosis associated with Hashimoto`s thyroiditis in a patient with a single functioning kidney

Retroperitoneal fibrosis (RPF) is a rare disease characterized by the presence of fibroinflammatory tissue around the abdominal aorta and ureteral entrapment in most cases. Idiopathic RPF is frequently reported in association with autoimmune diseases; however, there have been few reports of idiopathic RPF associated with Hashimoto`s thyroiditis. Here, we report a case of idiopathic RPF with Hashimoto`s thyroiditis in a patient with a single functioning kidney, which was successfully treated by corticosteroid therapy and transient intraureteral stent insertion with a double-J catheter.