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*Sigmoid volvulus has been reported in children and adolescents and is usually associated with abnormal colonic peristalsis.
*Sigmoid volvulus has been reported in children and adolescents and is usually associated with abnormal colonic peristalsis.
*Gastric volvulus is rare and the incidence peaks after the fifth decade.  
*Gastric volvulus is rare and the incidence peaks after the fifth decade.  
*The incidence of neonatal and infantile volvulus is unknown since non-rotation or malrotation of the gut may remain asymptomatic throughout life.<ref name="Burns2006">{{cite journal|last1=Burns|first1=Cartland|title=Principles and Practices of Pediatric Surgery|journal=Annals of Surgery|volume=243|issue=4|year=2006|pages=567|issn=0003-4932|doi=10.1097/01.sla.0000208423.52007.38}}</ref>
**In the United States, non-rotation is an incidental finding in 2 out of 1000 upper gastrointestinal contrast studies.
**In the United States, symptomatic malrotation in neonates occurs in 1 in 6000 live births.


===Race===
===Race===
Line 41: Line 44:
*In the United States, volvulus only accounts for 10% of cases with intestinal obstruction.
*In the United States, volvulus only accounts for 10% of cases with intestinal obstruction.


==Neonatal and Infantile volvulus==


Rotational anomalies occur as a result of an arrest of normal rotation of the embryonic gut. Because rotational anomalies may remain asymptomatic throughout a person’s life span, the true incidence is not known. Nonrotation, a type of malrotation is an incidental finding on approximately 2 out of 1000 upper gastrointestinal contrast studies [1]. Symptomatic malrotation in neonates occurs with a frequency of about 1 in 6000 live births.


Traditionally, intestinal malrotation has been considered primarily a disease of infancy with infrequent occurrence beyond the first year of life [2,3]. However, analysis of 2744 cases of intestinal rotation in children up to 17 years of age obtained from a national hospital discharge database found the following [2]:
●Presentation by one month of age: 30 percent
●Presentation before one year of age: 58 percent
●Presentation before five years of age: 75 percent
Similarly, in a series of 170 patients of all ages with symptomatic intestinal malrotation managed at a single institution, age distribution at time of presentation was as follows [3]:
●Infants under one year of age: 31 percent
●Children 1 to 18 years of age: 21 percent
●Adults over 18 years of age: 48 percent
Thus, the prevalence of malrotation in children over one year of age and adults appears to be higher than previously thought.
Associated congenital defects — Up to 62 percent of children who have intestinal malrotation have an associated anomaly (table 1) [4-7].
Based upon a systematic review of small, single-institution studies, the following conditions have demonstrated a strong association with intestinal malrotation [8]:
●Congenital diaphragmatic hernia – Up to 100 percent
●Congenital heart disease, especially heterotaxy syndrome – 40 to 90 percent (see 'Screening' below)
●Omphalocele – 31 to 45 percent
Intestinal malrotation is also associated with:
●Gastroschisis (see "Gastroschisis", section on 'Associated anomalies and findings')
●Prune belly syndrome (see "Prune-belly syndrome", section on 'Abdominal wall and gastrointestinal tract')
●Certain types of intestinal atresias [9] (see "Intestinal atresia")
●Esophageal atresia (solitary and with tracheoesophageal fistula) [10]
●Biliary atresia in patients with laterality malformations (see "Biliary atresia", section on 'Types of biliary atresia')
●Meckel diverticulum [11]
●Complex anorectal malformations or anorectal malformations with 2 or more anomalies of the VACTERL (vertebral, anal, cardiac, tracheoesophageal, renal, limb) complex [12,13]
●Cornelia de Lange syndrome [14]


==References==
==References==

Revision as of 18:57, 27 December 2017

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: ; Hadeel Maksoud M.D.[2]


Overview

Acute mechanical small bowel obstruction is a common surgical emergency where volvulus is the cause in 10% of cases. It is estimated that over 300,000 laparotomies are performed per year in the United States for adhesion-related obstructions such as volvulus .

Epidemiology and Demographics

Incidence

  • The incidence of volvulus is approximately 2 per 100,000 individuals worldwide.[1][2][3][4]
  • Sigmoid volvulus has the highest incidence accounting for 75 - 80% of volvulus cases.
  • Cecal volvulus has the second highest incidence accounting for 20 - 25% of volvulus cases.
  • The incidence of cecal volvulus increases by 5.53 percent per year, whereas the incidence of sigmoid volvulus remains stable.
  • In other studies, the incidence of cecal volvulus ranges from 2.8 to 7.1 per million people per year.
  • The incidence of gastric volvulus is rare.[5]

Prevalence

  • In 2002 - 2010, the prevalence of colonic volvulus is estimated to be 63,749 cases in the United States annually.[4]

Case-fatality rate/Mortality rate

  • The mortality rate of volvulus is approximately 7%.[3]

Age

  • The incidence of volvulus increases with age; the median age at diagnosis is 70 years.[4][6][5]
  • Sigmoid volvulus has been reported in children and adolescents and is usually associated with abnormal colonic peristalsis.
  • Gastric volvulus is rare and the incidence peaks after the fifth decade.
  • The incidence of neonatal and infantile volvulus is unknown since non-rotation or malrotation of the gut may remain asymptomatic throughout life.[7]
    • In the United States, non-rotation is an incidental finding in 2 out of 1000 upper gastrointestinal contrast studies.
    • In the United States, symptomatic malrotation in neonates occurs in 1 in 6000 live births.

Race

  • Volvulus usually affects individuals of the Black race.[8][9]
    • Black individuals are at increased risk for volvulus because they tend to have a longer mesentery and sigmoid colon.

Gender

  • Most studies have found that volvulus affects men and women equally.[10][11][12]
  • Although some studies have found a predominance in men, cecal volvulus has been found to be more prevalent in younger females.

Region

  • The majority of volvulus cases are reported in Russia, India, Iran, Norway and Africa.[3]
  • In the United States, volvulus only accounts for 10% of cases with intestinal obstruction.



References

  1. Katoh T, Shigemori T, Fukaya R, Suzuki H (2009). "Cecal volvulus: report of a case and review of Japanese literature". World J. Gastroenterol. 15 (20): 2547–9. PMC 2686916. PMID 19469008.
  2. Consorti ET, Liu TH (2005). "Diagnosis and treatment of caecal volvulus". Postgrad Med J. 81 (962): 772–6. doi:10.1136/pgmj.2005.035311. PMC 1743408. PMID 16344301.
  3. 3.0 3.1 3.2 Ballantyne GH, Brandner MD, Beart RW, Ilstrup DM (1985). "Volvulus of the colon. Incidence and mortality". Ann. Surg. 202 (1): 83–92. PMC 1250842. PMID 4015215.
  4. 4.0 4.1 4.2 Halabi WJ, Jafari MD, Kang CY, Nguyen VQ, Carmichael JC, Mills S, Pigazzi A, Stamos MJ (2014). "Colonic volvulus in the United States: trends, outcomes, and predictors of mortality". Ann. Surg. 259 (2): 293–301. doi:10.1097/SLA.0b013e31828c88ac. PMID 23511842.
  5. 5.0 5.1 Wu MH, Chang YC, Wu CH, Kang SC, Kuan JT (2010). "Acute gastric volvulus: a rare but real surgical emergency". Am J Emerg Med. 28 (1): 118.e5–7. doi:10.1016/j.ajem.2009.04.031. PMID 20006232.
  6. Krupsky S, Halevy A, Orda R (1987). "Sigmoid volvulus in adolescence". J. Clin. Gastroenterol. 9 (4): 467–9. PMID 3655280.
  7. Burns, Cartland (2006). "Principles and Practices of Pediatric Surgery". Annals of Surgery. 243 (4): 567. doi:10.1097/01.sla.0000208423.52007.38. ISSN 0003-4932.
  8. Madiba TE, Aldous C, Haffajee MR (2015). "The morphology of the foetal sigmoid colon in the African population: a possible predisposition to sigmoid volvulus". Colorectal Dis. 17 (12): 1114–20. doi:10.1111/codi.13042. PMID 26112767.
  9. Michael SA, Rabi S (2015). "Morphology of Sigmoid Colon in South Indian Population: A Cadaveric Study". J Clin Diagn Res. 9 (8): AC04–7. doi:10.7860/JCDR/2015/13850.6364. PMC 4576524. PMID 26435933.
  10. Påhlman L, Enblad P, Rudberg C, Krog M (1989). "Volvulus of the colon. A review of 93 cases and current aspects of treatment". Acta Chir Scand. 155 (1): 53–6. PMID 2929205.
  11. Baker DM, Wardrop PJ, Burrell H, Hardcastle JD (1994). "The management of acute sigmoid volvulus in Nottingham". J R Coll Surg Edinb. 39 (5): 304–6. PMID 7861341.
  12. Isbister WH (1996). "Large bowel volvulus". Int J Colorectal Dis. 11 (2): 96–8. PMID 8739835.

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