Question: What is (are) Hirschsprung's disease ?
Answer: Hirschsprung disease is a disease of the large intestine or colon. People with this disease do not have the nerve cells in the intestine required to expel stools from the body normally. Symptoms of Hirschsprung disease usually show up in very young children, but sometimes not until adolescence or adulthood. The symptoms may vary with age, but often involve constipation and/or obstruction of the bowel.
Source: GARD

Question: What causes Hirschsprung's disease ?
Answer: What causes Hirschsprung disease? There are a number of different causes of Hirschsprung disease (HSCR). For example, HSCR may occur as: A part of a syndrome In association with a chromosome anomaly (such as trisomy 21 or Down syndrome) Along with other birth defects but not as a part of a known syndrome As an isolated condition
Source: GARD

Question: Is Hirschsprung's disease inherited ?
Answer: Is Hirschsprung's disease inherited? Hirschsprung's disease (HSCR) usually occurs occurs by itself without other symptoms and is called isolated HSCR. Isolated HSCR has multifactorial inheritance, which means that multiple genes interact with environmental factors to cause the condition. When someone has a child with isolated HSCR, the overall risk to have another child with the condition is 4%. There are some factors that can change the risk. For example, the risk is higher if the sibling has long-segment disease rather than short-segment disease. Also males are more likely than females to develop HSCR. Another factor is if the siblings have the same or different parents. If HSCR occurs as part of a genetic syndrome, then it is inherited in a specific pattern. For example, the inheritance may be autosomal recessive, autosomal dominant, or X-linked recessive, depending on the exact cause of the syndrome. Individuals who are interested in learning about their personal risks or risks to family members should speak with their health care provider or a genetics professional.
Source: GARD