4) A 16 year-old woman with amenorrhea and BMI 28 complaining of myalgias.

• 4) A 16 year-old woman with amenorrhea and BMI 28 complaining of myalgias.

• Labs:

• Na 136 Cl 101 BUN/creatinine 28/.8

• K 2.3 Bicarb 31

• Urinary electrolytes: Na 8 K 45 Cl 25

• Select the most likely electrolyte disorder:

• Diuretic abuse

• Surreptitious vomiting

• Hypokalemic periodic paralysis

• Gitelman’s syndrome

• Conn’s syndrome