Hirschsprung's disease, also known as colonic aganglionosis, is a congenital disorder associated with the absence of nerve ganglia in the distal colon. This leads to impaired peristalsis, which causes difficulty in passing stool and leads to chronic constipation, dilation of the proximal colon (megacolon), and the development of intestinal obstruction. The disease is usually diagnosed in the first days or weeks of life, but in some cases it can manifest itself later in life. The main method of treatment is surgery aimed at removing the affected part of the intestine.
History of the disease and interesting historical facts
Hirschsprung's disease was first described in 1888 by Danish pediatrician Harold Hirschsprung, who observed two newborns with chronic constipation and dilated colons. He suggested that the disease was due to the absence of nerve cells in the intestinal wall, which was later confirmed by research in the mid-20th century. In 1948, the first successful operation to remove the affected section of the intestine was performed, opening up the possibility of effective surgical treatment of the disease. Thanks to advances in surgery and molecular genetics, Hirschsprung's disease can now be diagnosed and treated in its early stages, significantly improving the prognosis for patients.
Epidemiology
Hirschsprung disease occurs with an incidence of 1 in 5,000 live births. The disease is diagnosed more often in boys than in girls, with a ratio of approximately 4:1. It is also more common in children with Down syndrome, where its incidence reaches 2-10%. In 80% cases, only the rectosigmoid colon is affected, in 15% the lesion extends to the entire colon, and in rare cases to the small intestine. The disease can be diagnosed in all age groups, but symptoms most often appear in the neonatal period.
Genetic predisposition to this disease
Hirschsprung disease is a multifactorial disorder with a genetic basis. The main genes associated with the disease include RET (the most common mutation), EDNRB, GDNF and other genes that are involved in the development of the enteric nerve ganglia during embryogenesis. In 50% cases of familial aganglionosis, mutations are found in the RET gene, which encodes a tyrosine kinase receptor that plays a key role in the migration of nerve cells. Inheritance can be either autosomal dominant or autosomal recessive, which explains the different severity and variability of symptoms.
Risk factors for the development of this disease
The main risk factors for developing Hirschsprung's disease are:
— Genetic predisposition, especially if the disease has occurred in close relatives.
— The presence of Down syndrome and other genetic syndromes, such as Cartavena syndrome or BARS (Waardenburg Syndrome).
— The gender of the child - boys are more susceptible to this disease.
— Mutations in genes involved in the development of the nervous system, such as RET and EDNRB.
In addition to genetic factors, environmental and epigenetic factors may influence the development of the disease, although their role has not been sufficiently studied.
Diagnosis of this disease
Diagnosis of Hirschsprung's disease is based on clinical symptoms and instrumental examination methods. The main symptoms include:
— Absence of meconium within the first 48 hours after birth.
- Chronic constipation.
- Abdominal distension and intestinal obstruction.
- Vomiting bile or feces.
The following methods are used to confirm the diagnosis:
— Barium X-ray – to assess the condition of the colon and identify its dilated sections.
— Rectal biopsy is the gold standard for diagnosis, allowing to detect the absence of ganglion cells.
— Anorectal manometry — allows to evaluate the function of the internal anal sphincter, which often remains tense in Hirschsprung's disease.
Differential diagnosis includes conditions such as congenital intestinal obstruction, hypothyroidism, short bowel syndrome and megacolon.
Treatment
The main treatment for Hirschsprung's disease is surgical removal of the affected segment of the intestine, followed by restoration of normal patency. The main stages of treatment include:
— Resection of the aganglionic portion of the intestine.
— Restoration of colon patency by connecting the healthy part of the intestine to the anus (colonastomosis).
— Sometimes, in severe cases, temporary stoma removal is required.
Pharmacological treatment, including laxatives and enemas, is used prior to surgery to relieve symptoms. Antibiotics may also be needed postoperatively to prevent infectious complications.
List of medications used to treat this disease
— Antibiotics (cephalosporins, metronidazole) are used in the postoperative period to prevent infections.
— Anti-inflammatory drugs – to control inflammatory reactions in the intestines.
— Probiotics – to normalize intestinal microflora after surgery.
— Laxatives and enemas - for temporary relief of constipation before surgery.
Disease monitoring
After surgery, patients require regular monitoring to assess the functional state of the intestine and prevent possible complications, such as intestinal infections, inflammation or strictures. It is important to monitor the child's condition and nutrition to prevent delayed physical development and underweight. Regular consultations with the surgeon, gastroenterologist and nutritionist will help adjust the treatment and maintain the patient's health.
Age-related features of the disease
Hirschsprung's disease is most often diagnosed in newborns and young children. In newborns, the main symptom is meconium retention, and in older children, chronic constipation and abdominal distension. In adult patients, Hirschsprung's disease is extremely rare, and symptoms may be less pronounced, which sometimes makes diagnosis difficult. It is important to remember that the earlier surgical treatment is performed, the better the prognosis for the patient.
Questions and Answers
- What is Hirschsprung's disease? This is a congenital disorder in which there are no nerve ganglia in the wall of the colon, which leads to impaired peristalsis and chronic constipation.
- What are the main symptoms of Hirschsprung's disease? The main symptoms include delayed meconium passage in newborns, chronic constipation, abdominal distension and intestinal obstruction.
- What treatments are used for Hirschsprung's disease? The main method of treatment is surgical removal of the affected part of the intestine, followed by restoration of its patency.
- Can Hirschsprung's disease be diagnosed in adults? Yes, although this is rare. In adults, the disease may occur with less pronounced symptoms, such as chronic constipation.
- What complications can occur with Hirschsprung's disease? Possible complications include intestinal obstruction, inflammation, intestinal strictures and infections.
