A 70-year-old male with recurrent UTIs undergoes a renal ult…

A 70-year-old male with recurrent UTIs undergoes a renal ultrasound. Images demonstrate multiple fluid-filled structures located within the renal sinus that do not communicate with each other or with the infundibula/renal pelvis. What pathology is most consistent with these findings?

A 26-year-old female presents with recurrent nephrolithiasis…

A 26-year-old female presents with recurrent nephrolithiasis and dysuria. Ultrasound of the kidneys reveals bright, highly echogenic medullary pyramids bilaterally. The renal cortex appears normal. What congenital dysplastic disorder is represented by this appearance?