A 45-year-old man is hospitalized for sepsis.

A few days later, his urine output drops, and his creatinine rises.

Urinalysis shows muddy brown casts.

What is the most likely diagnosis?

A 30-year-old woman with a history of recurrent UTIs presents with fever, flank pain, and nausea.

Urinalysis shows WBC casts and positive nitrites.

What is the most likely diagnosis?

Malignant nephrosclerosis is most commonly associated with which of the following?

A 28-year-old woman presents with dysuria, urinary frequency, and suprapubic discomfort.

She has no fever or flank pain.

Urinalysis reveals positive nitrites, leukocyte esterase, and pyuria.

What is the most likely diagnosis?

A 6-year-old child presents with polyuria, growth retardation, and rickets.

Laboratory tests reveal glucosuria, aminoaciduria, and phosphaturia despite normal blood glucose levels.

What is the most likely diagnosis?

A patient with gout develops nephrolithiasis. Which type of stone is most likely responsible?

What histopathologic feature is most commonly associated with benign nephrosclerosis?

Polycystic kidney disease is most commonly associated with which of the following?