Hirschsprung's disease: Difference between revisions

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'''Hirschsprung's disease''' (HD), also known as '''congenital aganglionic megacolon''', is a medical condition characterized by the absence of [[ganglion cells]] in the [[intestinal wall]], which results in a blockage of the [[large intestine]] due to improper muscle contraction. This condition is congenital, meaning it is present at birth, and it significantly affects the [[colon]]'s ability to move stool through the intestine. The disease is named after Harald Hirschsprung, the Danish physician who first described the condition in 1886.
{{SI}}
{{Infobox medical condition
| name            = Hirschsprung's disease
| image          = [[File:Hirschsprung_acetylcholine.jpg|250px]]
| caption        = Histological image showing absence of ganglion cells in Hirschsprung's disease
| field          = [[Gastroenterology]], [[Pediatric surgery]]
| synonyms        = Congenital aganglionic megacolon
| symptoms        = [[Constipation]], [[abdominal distension]], [[vomiting]], [[failure to thrive]]
| complications  = [[Enterocolitis]], [[bowel obstruction]], [[perforation]]
| onset          = [[Neonatal]]
| duration        = Long-term
| causes          = [[Genetic mutation]]
| risks          = [[Family history]], [[Down syndrome]], [[Waardenburg syndrome]]
| diagnosis      = [[Rectal biopsy]], [[anorectal manometry]], [[contrast enema]]
| differential    = [[Chronic constipation]], [[intestinal pseudo-obstruction]]
| treatment      = [[Surgical resection]] of the affected bowel segment
| medication      = [[Laxatives]], [[antibiotics]] for complications
| prognosis      = Generally good with treatment
| frequency      = 1 in 5,000 live births
| deaths          = Rare with treatment
}}
{{Short description|A congenital condition affecting the colon}}


==Causes and Genetics==
== Introduction ==
Hirschsprung's disease is primarily caused by a mutation in one of several genes involved in the development of the enteric nervous system, including the RET proto-oncogene. These genetic mutations lead to the absence of ganglion cells in the distal bowel. The condition is typically inherited in an autosomal dominant pattern, but can also occur sporadically, without a family history.
[[File:Hirschsprung.jpg|left|thumb|Diagram illustrating the affected colon in Hirschsprung's disease]]
 
'''Hirschsprung's disease''' is a congenital condition characterized by the absence of [[ganglion cells]] in the [[colon]], leading to severe [[constipation]] or [[intestinal obstruction]]. This condition is also known as congenital aganglionic megacolon. It is named after the Danish physician [[Harald Hirschsprung]], who first described the condition in 1888.
==Symptoms==
== Pathophysiology ==
Symptoms of Hirschsprung's disease usually appear in newborns and may include:
In Hirschsprung's disease, the absence of ganglion cells occurs in the [[myenteric plexus]] and [[submucosal plexus]] of the bowel. This results in a lack of peristalsis in the affected segment, causing a functional obstruction. The proximal bowel becomes dilated due to the accumulation of fecal material, leading to the characteristic megacolon.
* Failure to pass [[meconium]] within the first 48 hours after birth
== Clinical Presentation ==
* Chronic constipation
The disease typically presents in [[newborn]]s with symptoms such as failure to pass [[meconium]] within the first 48 hours of life, abdominal distension, and vomiting. In older children, it may present as chronic constipation, [[failure to thrive]], and [[enterocolitis]].
* Abdominal swelling
== Diagnosis ==
* Vomiting
Diagnosis is confirmed through a combination of clinical evaluation, radiological imaging, and histopathological examination. A [[barium enema]] may show a transition zone between the normal and affected bowel. A definitive diagnosis is made by a rectal biopsy demonstrating the absence of ganglion cells.
* Poor feeding and growth
== Treatment ==
* Diarrhea and enterocolitis in severe cases
The primary treatment for Hirschsprung's disease is surgical. The most common procedure is the pull-through surgery, where the aganglionic segment is resected, and the normal bowel is anastomosed to the [[anus]].
 
== Prognosis ==
==Diagnosis==
With appropriate surgical intervention, most children with Hirschsprung's disease can lead normal lives. However, some may experience complications such as enterocolitis, fecal incontinence, or constipation post-surgery.
Diagnosis of Hirschsprung's disease involves a combination of clinical evaluation and diagnostic tests, including:
== See also ==
* Anorectal manometry
* Barium enema
* Rectal biopsy, which is the definitive test for diagnosing the absence of ganglion cells
 
==Treatment==
The primary treatment for Hirschsprung's disease is surgical removal of the affected segment of the colon. The most common surgical procedures include:
* The Swenson procedure
* The Soave procedure
* The Duhamel procedure
* The Transanal endorectal pull-through (TEPT)
 
Post-surgery, patients may still experience issues such as constipation or incontinence, but these can often be managed with medical and behavioral therapies.
 
==Prognosis==
With proper treatment, the prognosis for individuals with Hirschsprung's disease is generally good. Early diagnosis and treatment are crucial to prevent serious complications such as enterocolitis, which can be life-threatening.
 
==Epidemiology==
Hirschsprung's disease affects approximately 1 in 5,000 live births and is more common in males than in females. It is also more frequently observed in individuals with certain genetic conditions, such as Down syndrome.
 
==See Also==
* [[Gastrointestinal tract]]
* [[Congenital disorder]]
* [[Congenital disorder]]
* [[Intestinal obstruction]]
* [[Pediatric surgery]]
* [[Pediatric surgery]]
[[Category:Digestive system diseases]]
[[Category:Congenital disorders of digestive system]]
[[Category:Congenital disorders of digestive system]]
{{Medicine-stub}}
[[Category:Pediatric diseases]]

Latest revision as of 04:20, 7 April 2025

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Hirschsprung's disease
Synonyms Congenital aganglionic megacolon
Pronounce N/A
Specialty N/A
Symptoms Constipation, abdominal distension, vomiting, failure to thrive
Complications Enterocolitis, bowel obstruction, perforation
Onset Neonatal
Duration Long-term
Types N/A
Causes Genetic mutation
Risks Family history, Down syndrome, Waardenburg syndrome
Diagnosis Rectal biopsy, anorectal manometry, contrast enema
Differential diagnosis Chronic constipation, intestinal pseudo-obstruction
Prevention N/A
Treatment Surgical resection of the affected bowel segment
Medication Laxatives, antibiotics for complications
Prognosis Generally good with treatment
Frequency 1 in 5,000 live births
Deaths Rare with treatment


Introduction[edit]

Diagram illustrating the affected colon in Hirschsprung's disease

Hirschsprung's disease is a congenital condition characterized by the absence of ganglion cells in the colon, leading to severe constipation or intestinal obstruction. This condition is also known as congenital aganglionic megacolon. It is named after the Danish physician Harald Hirschsprung, who first described the condition in 1888.

Pathophysiology[edit]

In Hirschsprung's disease, the absence of ganglion cells occurs in the myenteric plexus and submucosal plexus of the bowel. This results in a lack of peristalsis in the affected segment, causing a functional obstruction. The proximal bowel becomes dilated due to the accumulation of fecal material, leading to the characteristic megacolon.

Clinical Presentation[edit]

The disease typically presents in newborns with symptoms such as failure to pass meconium within the first 48 hours of life, abdominal distension, and vomiting. In older children, it may present as chronic constipation, failure to thrive, and enterocolitis.

Diagnosis[edit]

Diagnosis is confirmed through a combination of clinical evaluation, radiological imaging, and histopathological examination. A barium enema may show a transition zone between the normal and affected bowel. A definitive diagnosis is made by a rectal biopsy demonstrating the absence of ganglion cells.

Treatment[edit]

The primary treatment for Hirschsprung's disease is surgical. The most common procedure is the pull-through surgery, where the aganglionic segment is resected, and the normal bowel is anastomosed to the anus.

Prognosis[edit]

With appropriate surgical intervention, most children with Hirschsprung's disease can lead normal lives. However, some may experience complications such as enterocolitis, fecal incontinence, or constipation post-surgery.

See also[edit]