Isolated multiple intestinal atresia

Isolated multiple intestinal atresia (MIA) is a rare congenital gastrointestinal malformation characterized by the presence of multiple atretic (obstructed or absent) segments at various levels of the small and/or large intestine. Unlike intestinal atresia occurring as a single lesion, MIA involves numerous sites of obstruction, giving the bowel a characteristic 'string of sausages' or 'apple peel' appearance on imaging or at surgery. The condition presents in the neonatal period with signs of intestinal obstruction, including bilious vomiting, abdominal distension, and failure to pass meconium. It occurs without other major associated congenital anomalies, distinguishing it from syndromic forms of intestinal atresia. The hereditary form of isolated MIA has been linked to mutations in the TTC7A gene, which plays a role in intestinal epithelial cell polarity and immune function. Some patients with TTC7A mutations may also develop combined immunodeficiency, though in the isolated intestinal form, immune dysfunction may be absent or mild. The condition follows an autosomal recessive inheritance pattern in familial cases, with consanguinity reported in several affected families. Treatment is primarily surgical and involves resection of atretic segments with anastomosis to restore intestinal continuity. However, the extensive nature of the atresias often results in significant loss of bowel length, leading to short bowel syndrome and long-term dependence on parenteral nutrition (intravenous feeding). Prognosis varies considerably depending on the extent of bowel involvement and the remaining functional intestinal length. Despite advances in neonatal surgical care and nutritional support, morbidity and mortality remain significant, and some patients may ultimately require intestinal transplantation. Early genetic diagnosis and multidisciplinary management involving pediatric surgeons, gastroenterologists, immunologists, and nutritional specialists are essential for optimizing outcomes.

Common questions about Isolated multiple intestinal atresia