Nephrology image/primary localized amyloidosis of the ureter

A 67-year-old woman with a history of recurrent urinary tract infections was admitted for investigation of intermittent gross hematuria and left flank pain. All blood tests were normal. Urinalysis revealed hematuria. Urine cultures were negative. Cystoscopy was unremarkable. Urine cytology was inconclusive; there were small clusters of urothelial cells showing mild atypia. Retrograde pyelography (Figure 1) and computed tomography urography were...