| A rare genetic syndromic intestinal disorder characterized by congenital onset of severe watery diarrhea containing high concentrations of sodium, hyponatremia and metabolic acidosis, and generally, unilateral or bilateral choanal atresia and corneal erosions. Additional congenital malformations may include intestinal atresia and hexadactyly. The disorder is due to homozygous or compound-heterozygous mutations in serine peptidase inhibitor, Kunitz type 2 (SPINT2; encoded by SPINT2, 19q13.2), resulting in abrogated sodium absorption, enhanced fluid secretion and diarrhea. The pattern of inheritance is autosomal recessive (AR) for SPINT2 mutations. The risk of disease transmission to offspring for AR disease is 25% where both parents are unaffected carriers. |
