StayCurrentMD · Hirschsprung's Disease
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Podcast20 min·Published Oct 2020Older

Hirschsprung's Disease

With Dr. Jason Frischer & Dr. Aaron Garrison · hosted by Dr. Rod Girardo · StayCurrentMD
Cued at 13:54 · stops at 14:39 · press play
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What the experts said50 expert statements
Hirschsprung disease is a congenital developmental anomaly of intestinal ganglion cell migration that results in a functional bowel obstruction.
ClinicalAaron Garrison
More than 95% of neonates pass meconium within the first 48 hours of life, and failure to pass meconium is typical of Hirschsprung's disease.
ClinicalJason Frischer
Some infants with Hirschsprung's disease do pass meconium.
ClinicalJason Frischer
Hirschsprung disease has an incidence of about 1 in 5,000 children.
EpidemiologicalAaron Garrison
About 10% of children with Hirschsprung disease will have a positive family history.
EpidemiologicalAaron Garrison
There are predisposing genetic conditions such as the RET gene that can be associated with Hirschsprung disease.
ClinicalAaron Garrison
Up to 10% of children with Hirschsprung's disease will have trisomy 21.
EpidemiologicalAaron Garrison
Only 1 to 2% of patients with trisomy 21 have Hirschsprung disease.
EpidemiologicalAaron Garrison
Hirschsprung disease is associated with Waardenburg syndrome, congenital central hypoventilation (Ondine's curse), and some other syndromes.
ClinicalAaron Garrison
The classic finding on contrast enema is a transition zone in the rectosigmoid, but that transition zone can be located anywhere within the bowel.
ClinicalJason Frischer
A rectosigmoid ratio of less than 1.0 is suggestive of Hirschsprung's disease, meaning the aganglionic bowel is contracted and narrow compared to the dilated ganglionated bowel more proximal.
ClinicalJason Frischer
In total colonic Hirschsprung's disease, a foreshortened or question mark colon can be seen on contrast enema.
ClinicalJason Frischer
Approximately 10% of newborns with Hirschsprung's disease may lack the typical findings on a contrast enema.
EpidemiologicalJason Frischer
Rectal biopsy is the true definitive diagnosis for Hirschsprung disease.
ClinicalJason Frischer
Typical features on rectal biopsy include absence of ganglion cells, presence of hypertrophic nerves, abnormal pattern of cholinesterase staining, and an absence of calretinine staining.
ClinicalJason Frischer
To be considered an adequate biopsy, it must be taken from the rectum at least one centimeter above the dentate line and must include both mucosa and submucosal layers.
ClinicalJason Frischer
Suction biopsy technique is typically used for patients less than six months of age.
ClinicalJason Frischer
Full thickness biopsy technique should be considered for patients older than six months, or when a suction biopsy is inadequate.
ClinicalJason Frischer
In Hirschsprung's disease, anorectal manometry shows a lack of the rectoanal inhibitory reflex (RAIR).
ClinicalJason Frischer
The rectoanal inhibitory reflex may be absent in other conditions as well, and some children have a false positive test.
ClinicalJason Frischer
Any patient with an absent RAIR must undergo a rectal biopsy for confirmation of the diagnosis.
GuidelineJason Frischer
Enterocolitis is the life-threatening part of Hirschsprung's disease.
ClinicalAaron Garrison
NICU babies diagnosed with Hirschsprung's disease are typically managed with irrigations, antibiotics if they show evidence of enterocolitis, and NPO or NG tubes if they're distended.
ClinicalAaron Garrison
Older children with Hirschsprung disease often have dilated colon and are not amenable to just doing a primary pull-through in many cases.
ClinicalAaron Garrison
The three goals of surgical management are: identify the extent of the aganglionic segment, resect that segment, and restore the bowel to its continuity.
ClinicalJason Frischer
The contrast enema can be used as a roadmap for surgery, and most times it is accurate to where the level is, but not always.
ClinicalAaron Garrison
The goal of surgery is to get past the aganglionic segment into the normally innervated bowel that does not have hypertrophic nerves, and to pull that segment of bowel down through and perform anastomosis above the dentate line.
ClinicalAaron Garrison
In the Swenson procedure, you pull down the aganglionic bowel and perform a full thickness anastomosis one to two centimeters above the dentate line, leaving the most minimal amount of aganglionic bowel possible.
ClinicalJason Frischer
In the Swenson procedure, it is very important to be cautious about injuring the urethra as it's quite close, especially in boys.
ClinicalJason Frischer
The Suave procedure involves performing a mucosectomy from a transanal approach slightly above the dentate line and pulling through the normal bowel.
ClinicalJason Frischer
In the Suave procedure, the actual anastomosis is performed within a cuff of aganglionic rectum.
ClinicalJason Frischer
The Suave procedure theoretically causes less injury to pelvic structures, nerves, urethra and vagina.
OpinionJason Frischer
A con of the Suave procedure is that the aganglionic cuff can become stiff enough to cause an obstruction or outlet obstruction.
ClinicalJason Frischer
In the Duhamel procedure, you intentionally leave a portion of the aganglionic rectum behind and bring the normally ganglionated bowel posterior to that rectum, then make an anastomosis using a stapler to create a common panel.
ClinicalAaron Garrison
The Duhamel procedure involves less dissection in the pelvis, so there may be less injury to pelvic structures.
OpinionAaron Garrison
Children who have the Duhamel procedure may have higher risks of constipation and stool withholding because they can have trouble evacuating the pouch.
ClinicalAaron Garrison
In the Duhamel procedure, the anastomosis can leave a spur if it is not large enough, sometimes requiring revision.
ClinicalAaron Garrison
All three surgical techniques (Swenson, Suave, and Duhamel) are equally effective.
OpinionAaron Garrison
Early complications after Hirschsprung surgery include diaper rash and excoriation that can need to be treated like a burn.
ClinicalAaron Garrison
Anastomotic leaks are rare but usually show up in the first week after surgery with fever, abdominal distension, and possibly free air, often requiring another operation or proximal diversion.
ClinicalAaron Garrison
Hirschsprung's-associated enterocolitis is likely an inflammatory condition secondary to bacterial overgrowth.
ClinicalJason Frischer
A child with enterocolitis presents with abdominal distension, vomiting, fever, and change in bowel habits that could be either diarrhea or not passing stool at all.
ClinicalJason Frischer
Treatment of enterocolitis includes fluid resuscitation, digital rectal exam, and colonic irrigations.
ClinicalJason Frischer
For enterocolitis, antibiotics including metronidazole or broad-spectrum antibiotics are added depending on the severity of presentation.
ClinicalJason Frischer
About 80% of kids with Hirschsprung's disease are constipated and will need some kind of management.
EpidemiologicalAaron Garrison
Most patients with rectosigmoid Hirschsprung disease should be continent by the time they enter kindergarten.
ClinicalAaron Garrison
For patients not doing well after pull-through, if there is a stricture at the anastomosis, it needs to be addressed either through dilations or revising the pull through procedure.
ClinicalJason Frischer
Anatomic problems after pull-through can include a twist in the pull through, an obstructing cuff, a non-functioning Duhamel pouch, or a transition zone or continued aganglionic segment.
ClinicalJason Frischer
For patients with anatomic problems after pull-through, you typically have to revise the pull through.
ClinicalJason Frischer
For patients without anatomic problems after pull-through, treatment can include bowel management, Botox injection to relieve sphincter tone, or motility studies.
ClinicalJason Frischer