A 60-year-old woman comes to the emergency department due to left flank pain radiates to the left groin. Medical history is significant for recurrent urinary tract infections and hypothyroidism. Blood pressure is 130/80 mm Hg and pulse is 80/min. Physical examination shows left flank tenderness. There is no costovertebral angle tenderness. Imaging shows a stone in the middle of the right ureter. Which of the following is most likely to be seen on laboratory evaluation of this patient?

Question

A 60-year-old woman comes to the emergency department due to left flank pain radiates to the left groin.  Medical history is significant for recurrent urinary tract infections and hypothyroidism.  Blood pressure is 130/80 mm Hg and pulse is 80/min.  Physical examination shows left flank tenderness.   There is no costovertebral angle tenderness.  Imaging shows a stone in the middle of the right ureter.  Which of the following is most likely to be seen on laboratory evaluation of this patient?

Quizplus · Accepted Answer

Eductional Objective: Hypercalciuria is the most common risk factor for calcium (calcium oxalate and calcium phosphate) kidney stones in adults; contributing factors may include increased gastrointestinal absorption, increased mobilization of calcium from bone, or decreased renal tubular calcium reabsorption.  However, most patients remain normocalcemic due to regulation of plasma calcium levels by vitamin D and parathyroid hormone.

A 60-Year-Old Woman Comes to the Emergency Department Due to Left