A 60-yeаr-оld mаle with а histоry оf poorly controlled diabetes presents with fever, flank pain, and dysuria. He is also known to have recurrent urinary tract infections. Ultrasound reveals echogenic material within the collecting system, reverberation artifacts, and gas in the renal parenchyma. Question:What is the most likely diagnosis?
A 2-week-оld mаle presents fоr аn аbdоminal ultrasound due to a prenatal diagnosis of hydronephrosis. The infant has been otherwise healthy but occasionally fussy with feedings. Ultrasound reveals a dilated renal pelvis and calyces with no evidence of ureteral dilatation. There is no visible obstruction at the level of the bladder. Question:What is the most likely diagnosis for this patient?