“…3,4 Its etiology is unknown, although autoimmunity, infections, IUD usage, drug use, trauma, malignancy, abdominal surgery, urinary leakage, and local ischemia are all predisposing factors. [3][4][5][6][7] Case Report A 43-year-old female was admitted to our hospital with left flank pain. Intravenous pyelography (IVP), performed at another center, showed hydroureteronephrosis (Fig.…”