A heterogeneous group of disorders characterized by renal electrolyte transport dysfunctions. Congenital forms are rare autosomal disorders characterized by neonatal hypertension, hyperkalemia, increased renin activity and aldosterone concentration. The Type I features hyperkalemia with sodium wasting; Type II, hyperkalemia without sodium wasting. pseudohypoaldosteronism can be the result of a defective renal electrolyte transport protein or acquired after kidney transplantation.