Hypokalemia, hypomagnesemia, hypocalciuria, and recurrent tetany: Gitelman syndrome in a Chinese pedigree and literature review.

Gitelman syndrome is an autosomal recessive disease mostly associated with loss-of-function mutations of the SLC12A3 gene and featured by clinical hypokalemia, hypomagnesemia, hypocalciuria, and histologically hypertrophy of the juxtaglomerular apparatus. A novel homozygous mutation (p.Arg399Pro) at the extracellular domain of SLC12A3 was found and correlated with the severe clinical manifestations.