Hypokalemic quadriplegia in Sjogren's syndrome: A case report

Distal renal tubular acidosis (dRTA) occurs in approximately one-third of patients with Sjogren's syndrome, a systemic autoimmune disorder characterized by lymphocytic infiltration of exocrine glands, leading to dryness of mucous membranes. Hypokalemic paralysis, a well-documented but rare complication of dRTA, typically manifests as symmetric proximal muscle weakness of the extremities. We present the case of a 38-year-old woman with a history of Sjogren's syndrome diagnosed 3 years prior, who ceased her medication without medical supervision. She presented with quadriplegia, initially beginning unilaterally. This particular presentation is seldom documented in the literature. Laboratory investigations revealed hypokalemia and normal anion gap metabolic acidosis, consistent with dRTA-induced hypokalemic paralysis. Intravenous potassium chloride was administered, resulting in complete recovery of muscle strength. Hypokalemic paralysis associated with dRTA is typically reversible; however, delays in diagnosis and treatment can lead to life-threatening complications such as respiratory failure and arrhythmias. Therefore, clinicians should maintain a high index of suspicion for this condition in patients presenting with muscle weakness. Prompt and precise history takingand screening, and initiating appropriate management to prevent adverse outcomes.