6) A 20 year-old man with no PMH or meds presents with fatigue, nausea, diarrhea, and abdominal pain. On exam T 99.8 BP 80/60 P 110 and abdominal tenderness.

• 6) A 20 year-old man with no PMH or meds presents with fatigue, nausea, diarrhea, and abdominal pain. On exam T 99.8 BP 80/60 P 110 and abdominal tenderness.

• Labs:

• Na 124 Cl 101 BUN/creatinine 19/1.1

• K 6.8 C02 18 Glucose 52

• 24 hour urine K 5 mEq/L

• Which of the following would be most likely to reveal the underlying disorder?

• Blood digoxin level

• Serum CK

• ACTH stimulation test

• HgbA1C

• TTKG (Transtubular K gradient UK X Posm/ PK X Uosm