Diagnostic Challenge of Congenital Chloride Diarrhea and Ulcerative Colitis Overlap in an Adult Misdiagnosed with Bartter Syndrome: Case Report and Literature Review.

BACKGROUND Congenital chloride diarrhea (CCD) is an autosomal recessive disease that is usually diagnosed in early childhood. Mutations in the SLC26A3 gene have been attributed to the primary etiology of disease development. Patients with CCD usually present with electrolyte disturbances, metabolic alkalosis, and chronic diarrhea.