Differentials

Isolated hyperuricaemia

SIGNS / SYMPTOMS
INVESTIGATIONS
SIGNS / SYMPTOMS

Also associated with malignancy, particularly haematological malignancies.[34][52][53]

May be asymptomatic or present with nephrolithiasis or gout.

INVESTIGATIONS

Serum potassium, phosphate, and calcium levels are normal.

Isolated hyperkalaemia

SIGNS / SYMPTOMS
INVESTIGATIONS
SIGNS / SYMPTOMS

Patient may be taking potassium-sparing medication, systemic heparin, or non-steroidal anti-inflammatory drugs. Renal failure and frequent blood transfusions can contribute.[54]

INVESTIGATIONS

Serum uric acid, phosphate, and calcium levels are normal.

Isolated hyperphosphataemia

SIGNS / SYMPTOMS
INVESTIGATIONS
SIGNS / SYMPTOMS

History of dehydration and volume depletion, pulmonary embolism, bone metastases, or advanced renal failure.[54] Use of bisphosphonates, laxatives, and antacids may contribute. 

INVESTIGATIONS

Serum uric acid and potassium levels are normal.

Isolated hypocalcaemia

SIGNS / SYMPTOMS
INVESTIGATIONS
SIGNS / SYMPTOMS

Perioral numbness or tingling.

INVESTIGATIONS

Serum uric acid, phosphate, and potassium levels are normal.

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