Hirschsprung disease-type D brachydactyly syndrome

Hirschsprung disease-type D brachydactyly syndrome, also known as Hirschsprung disease with type D brachydactyly or brachydactyly-Hirschsprung syndrome, is an extremely rare genetic condition characterized by the co-occurrence of Hirschsprung disease and type D brachydactyly. Hirschsprung disease is a congenital disorder of the gastrointestinal system in which nerve cells (ganglion cells) are absent from a segment of the bowel, most commonly the distal colon and rectum. This absence of ganglion cells (aganglionosis) prevents normal peristalsis, leading to functional bowel obstruction, severe constipation, abdominal distension, and potentially life-threatening enterocolitis in the neonatal period. Type D brachydactyly refers to shortening of the distal phalanx of the thumb, resulting in characteristically short, broad thumbs. This syndrome affects primarily the gastrointestinal and skeletal systems. Affected individuals typically present in the neonatal period with symptoms of intestinal obstruction, including failure to pass meconium, abdominal distension, and vomiting. The brachydactyly component may be noted at birth or during early childhood. The condition has been reported in a very limited number of families, suggesting autosomal dominant inheritance with variable expressivity. Treatment of the Hirschsprung disease component involves surgical intervention, most commonly a pull-through procedure to remove the aganglionic segment of bowel and connect the normally innervated bowel to the anus. The brachydactyly component generally does not require treatment as it typically causes minimal functional impairment. Long-term follow-up is important for managing potential complications such as enterocolitis and bowel dysfunction after surgery.

Common questions about Hirschsprung disease-type D brachydactyly syndrome