Best of Five 3.54

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BOF: 3.54

A young female is admitted to your ward with chronic diarrhoea. On examination you note that she is of short stature, she has a round face, short neck, short fourth and fifth metacarpals and metatarsals.

Investigations reveal:

Hb 12.8 g/dl

Serum Calcium 1.62 mmol/l

Serum Phosphate 2.9 mmol/l

Creatinine 44 micromoles/l

Albumin 38 g/l

Plasma parathyroid hormone 2.9 pmol/L (normal 0.9 – 5.4 pmol/L)

After fluid resuscitation and correction of electrolyte imbalance her blood tests are repeated and come back as:

Plasma parathyroid hormone 9.3 pmol/L (normal 0.9 – 5.4 pmol/L)

In this case, correction of which one of the following would have accounted for this change?

a)      Sodium

b)      Potassium

c)      Chloride

d)     Phosphate

e) Magnesium

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