Sjogren's syndrome with distal renal tubular acidosis presenting as hypokalaemic paralysis

Gaurang Vaidya, Swapnil Ganeshpure
BMJ Case Reports 2012 October 19, 2012
A young lady with a history of repeated episodes of generalised weakness and fatigue presented to our hospital with similar symptoms and was found to have severe hypokalaemia. She had been previously diagnosed as hypokalaemic periodic paralysis but during this presentation she had also started complaining of the classic sicca-complex of Sjogren's syndrome, which was not present previously. On subsequent investigations she was found to have normal anion-gap metabolic acidosis with positive urine anion gap consistent with the diagnosis of distal renal tubular acidosis (RTA). It was thus concluded that the distal RTA secondary to Sjogren's syndrome was the cause of severe hypokalaemia in our patient. By presenting this case we aim to not only highlight one of the rare presentations of Sjogren's syndrome but also the favourable response of our patient to potassium replacement alone.

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