Hirschsprung's disease overview: Difference between revisions
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==Overview== | ==Overview== | ||
Hirschsprung's disease involves an enlargement of the [[colon (anatomy)|colon]] | Hirschsprung's disease involves an enlargement of the [[colon (anatomy)|colon]] caused by a [[bowel obstruction]] resulting from an [[ganglion|aganglionic]] section of [[bowel]]. The condition, in which the normal [[Enteric nervous system|enteric nerves]] are absent, begins from the [[anus]] and progresses proximally. The length of affected bowel varies, rarely extending more than approximately one foot. | ||
==Historical perspective== | ==Historical perspective== | ||
The disease is named after [[Harald Hirschsprung]], the Danish [[physician]] who first described the disease in 1886 | The disease is named after [[Harald Hirschsprung]], the Danish [[physician]] who first described the disease in 1886 when describing two infants who had died with swollen bellies. The autopsies showed identical pictures with pronounced dilatation and [[hypertrophy]] of the colon as dominant features. | ||
==Classification== | ==Classification== | ||
Hirschsprung's disease may be classified based on the extent of [[Colon (anatomy)|colon]] involvement | Hirschsprung's disease may be classified as rectosigmoid disease, long segment disease, or ultrashort segment disease based on the extent of [[Colon (anatomy)|colon]] involvement. | ||
==Pathophysiology== | ==Pathophysiology== | ||
Hirschsprung’s disease is a [[congenital]] disorder of colon in which certain nerve cells, | Hirschsprung’s disease is a [[congenital]] disorder of colon in which certain nerve cells, called ganglion cells, are absent. This may lead to [[chronic]] constipation.<ref>Worman and Ganiats 1995, Am Fam Physician 51, 487-494 [http://www.ncbi.nlm.nih.gov/pubmed/7840044]</ref> | ||
==Causes== | ==Causes== | ||
Hirschsprung's disease is caused by failure of myentric and [[submucosal]] [[Nerve plexus|nerve plexuses]] craniocaudal migration into the distal [[colon]]. | Hirschsprung's disease is caused by a failure of the myentric and [[submucosal]] [[Nerve plexus|nerve plexuses]] to complete craniocaudal migration into the distal [[colon]]. | ||
==Differentiating Hirschsprung's | ==Differentiating Hirschsprung's diseases from other diseases== | ||
Hirschsprung's disease must be differentiated from other diseases that cause [[meconium]] pass failure and | Hirschsprung's disease must be differentiated from other diseases that cause [[meconium]] pass failure and [[abdominal distension]] in infants, such as [[meconium plug syndrome]], [[small left colon syndrome]], or [[congenital hypothyroidism]]. | ||
==Epidemiology and Demographics== | ==Epidemiology and Demographics== | ||
The incidence of Hirschsprung's disease is 20 per 100,000 newborns. | The incidence of Hirschsprung's disease is 20 per 100,000 newborns. Hirschsprung's disease is three times more common in Asian Americans. Males are more commonly affected than females. | ||
==Risk Factors== | ==Risk Factors== | ||
The most potent risk factor for the development of Hirschsprung's disease is a strong family history (i.e. | The most potent risk factor for the development of Hirschsprung's disease is a strong family history (i.e. involvement of multiple family members). Other risk factors include a family history of long segment disease running in the family or the probation of being a female. | ||
==Screening== | ==Screening== | ||
Revision as of 13:58, 4 August 2017
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [2]; Associate Editor(s)-in-Chief: Ahmed Younes M.B.B.CH [3], Aditya Ganti M.B.B.S. [4]
Overview
Hirschsprung's disease involves an enlargement of the colon caused by a bowel obstruction resulting from an aganglionic section of bowel. The condition, in which the normal enteric nerves are absent, begins from the anus and progresses proximally. The length of affected bowel varies, rarely extending more than approximately one foot.
Historical perspective
The disease is named after Harald Hirschsprung, the Danish physician who first described the disease in 1886 when describing two infants who had died with swollen bellies. The autopsies showed identical pictures with pronounced dilatation and hypertrophy of the colon as dominant features.
Classification
Hirschsprung's disease may be classified as rectosigmoid disease, long segment disease, or ultrashort segment disease based on the extent of colon involvement.
Pathophysiology
Hirschsprung’s disease is a congenital disorder of colon in which certain nerve cells, called ganglion cells, are absent. This may lead to chronic constipation.[1]
Causes
Hirschsprung's disease is caused by a failure of the myentric and submucosal nerve plexuses to complete craniocaudal migration into the distal colon.
Differentiating Hirschsprung's diseases from other diseases
Hirschsprung's disease must be differentiated from other diseases that cause meconium pass failure and abdominal distension in infants, such as meconium plug syndrome, small left colon syndrome, or congenital hypothyroidism.
Epidemiology and Demographics
The incidence of Hirschsprung's disease is 20 per 100,000 newborns. Hirschsprung's disease is three times more common in Asian Americans. Males are more commonly affected than females.
Risk Factors
The most potent risk factor for the development of Hirschsprung's disease is a strong family history (i.e. involvement of multiple family members). Other risk factors include a family history of long segment disease running in the family or the probation of being a female.
Screening
According to the USPSTF, screening is not recommended for Hirschsprung's disease.
Natural History, Complications, and Prognosis
If left untreated, Hirschsprung's disease can lead to enterocolitis and even death. Common complications include enterocolitis, intestinal perforation, and short bowel syndrome. After appropriate surgical intervention, the odds of mortality drop significantly.
Diagnosis
History and Symptoms
Hirschsprung's disease is commonly diagnosed during the neonatal period. The cardinal symptoms of Hirschsprung's disease include abdominal distension, delayed passage of meconium (i.e., after 24-48 hours from birth), and vomiting. [2][3]
Physical Examination
Physical examination is nondiagnostic in newborns. It may reveal a distended abdomen and/or anal spasm. In older children, abdominal distension may result from the inability to release flatus.[3]
Laboratory Findings
There are no specific laboratory finding associated with hirschsprung's disease. All the pre-operation blood tests and coagulation tests will be within the reference range.[3]
X-ray
Abdominal x-ray is the modality of choice in diagnosing Hirschsprung's disease. Major finding is decreased bowel caliber of the involved segment along with colon distension.
CT Scan
There are no specific CT scan finding associated with Hirschsprung's disease.
MRI
There are no specific MRI finding associated with Hirschsprung's disease.
Other Imaging Findings
A barium enema is the mainstay of Hirschsprung’s disease diagnosis.
Other Diagnostic Studies
A rectal biopsy showing the absence of ganglion cells is the only definitive method of diagnosis.
Treatment
Medical Therapy
Medical therapy only plays a supportive role in the management of Hirschsprung's disease. Medical therapy indications include preventing disease complications, preventing post-operative infections, and managing post-operative bowel function. Intravenous fluid resuscitation and maintenance, nasogastric decompression, and the administration of intravenous antibiotics (as indicated) remain the cornerstones of initial medical management.[4][5]
Surgery
The usual treatment is pull-through surgery, in which the colon portion that already has nerve cells is pulled through and sewn over the portion that lacks nerve cells (National Digestive Diseases Information Clearinghouse).
Primary Prevention
There are no primary preventive measures for Hirschsprung's disease.
Secondary Prevention
To prevent complications of Hirschsprung's disease, diagnosis is required. Secondary preventive measures include the administration of laxatives and antibiotics to prevent obstruction and infection, respectively.
References
- ↑ Worman and Ganiats 1995, Am Fam Physician 51, 487-494 [1]
- ↑ Stanescu AL, Liszewski MC, Lee EY, Phillips GS (2017). "Neonatal Gastrointestinal Emergencies: Step-by-Step Approach". Radiol. Clin. North Am. 55 (4): 717–739. doi:10.1016/j.rcl.2017.02.010. PMID 28601177.
- ↑ 3.0 3.1 3.2 Das K, Mohanty S (2017). "Hirschsprung Disease - Current Diagnosis and Management". Indian J Pediatr. doi:10.1007/s12098-017-2371-8. PMID 28600660.
- ↑ Langer JC, Rollins MD, Levitt M, Gosain A, Torre L, Kapur RP, Cowles RA, Horton J, Rothstein DH, Goldstein AM (2017). "Guidelines for the management of postoperative obstructive symptoms in children with Hirschsprung disease". Pediatr. Surg. Int. 33 (5): 523–526. doi:10.1007/s00383-017-4066-7. PMID 28180937.
- ↑ Burkardt DD, Graham JM, Short SS, Frykman PK (2014). "Advances in Hirschsprung disease genetics and treatment strategies: an update for the primary care pediatrician". Clin Pediatr (Phila). 53 (1): 71–81. doi:10.1177/0009922813500846. PMID 24002048.