GU

Question 1

DDX medullary nephrocalcinosis

Answer 1

• Medullary sponge kidney (most common)
• Type I (distal) RTA
• Hyperparathyroidism
• Hypercalcinosis (hypervitaminosis D, milk-alkali syndrome)
• sarcoidosis
• oxaluria
• furosemide use

Question 2

DDx cortical nephrocalcinosis

Answer 2

• Renal cortical necrosis (severe systemic hypotension)
• chronic glomerulonephritis
• chronic pyelonephritis
• Alport syndrome
• oxaluria

Question 3

Findings and DDx of papillary necrosis

Answer 3

Findings

• lobster claw deformity, clubbed calyx filled with contrast material, clubbed calyx filled with nonenhancing debris, golf-ball-on-a-tee deformity - result from ischemic necrosis of the medullary apilla (often froma microangiopathic process

DDx NSAID

• NSAIDs
• Sickle cell disease
• Analgesic abuse
• Infection (Tb, fungal)
• DM