Idiopathic carpotarsal osteolysis with Bartter's syndrome. A case report and review of the literature.

Idiopathic carpotarsal osteolysis is 1 of the rare types of disappearing bone diseases characterized by painful limitation of movement and deformity of the wrist and tarsal joints, and associated with frequent episodes of joint inflammation and a radiographic appearance of osteolysis. Reported here is an 8-year-old girl with idiopathic carpotarsal osteolysis and Bartter's syndrome with significantly decreased re-absorption of chloride at distal renal tubules, low level of serum potassium, a metabolic alkalosis, and high levels of aldosterone and renin. Bartter's syndrome associated with idiopathic carpotarsal osteolysis has not been published previously. The typical plantar nodule in this patient confirmed the presence of fibromatosis with aggressive histologic signs in light and electron microscopic examination.