Hypokalemic periodic paralysis and renal tubular acidosis in a patient with hypothyroid and autoimmune disease.

Background: Hypokalemic periodic paralysis (HPP) is a rare muscle disorder characterized by episodic muscle weakness that can lead to respiratory failure. This disorder is a common manifestation of renal tubular acidosis. Renal tubular acidosis can occur associated with various systemic disorders such as Sjogren's syndrome and thyroid disorders.