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{{Irritable bowel syndrome}}
{{Irritable bowel syndrome}}
{{CMG}}; {{AE}}  
{{CMG}}; {{AE}} {{Cherry}}
==Overview==
==Overview==
There is no established system for the classification of [disease name].
[[Irritable bowel syndrome|Irritable bowel syndrome (IBS)]] may be classified according to Rome IV [[Criterion|criteria]] into [[Irritable bowel syndrome|IBS]] with predominant [[constipation]] , [[Irritable bowel syndrome|IBS]] with predominant [[diarrhea]], [[Irritable bowel syndrome|IBS]] with mixed [[Bowel|bowel habits]], and unclassified [[Irritable bowel syndrome|IBS]]. In addition, [[Irritable bowel syndrome|IBS]] occurring subsequent to [[gastrointestinal]] [[Infection|infections]] is known as post [[Infection|infectious]]-IBS (PI-[[Irritable bowel syndrome|IBS]]). The rationale behind these different sub-types is to maintain consistency of [[patient]] selection. This increases understanding of [[Pathophysiology|pathophysiological]] mechanisms, aids in effective [[diagnosis]], [[Treatment Planning|treatment]], and patient recruitment for [[Clinical trial|clinical trials]].
 
OR
 
[Disease name] may be classified according to [classification method] into [number] subtypes/groups: [group1], [group2], [group3], and [group4].
 
OR
 
[Disease name] may be classified into [large number > 6] subtypes based on [classification method 1], [classification method 2], and [classification method 3].
[Disease name] may be classified into several subtypes based on [classification method 1], [classification method 2], and [classification method 3].
 
OR
 
Based on the duration of symptoms, [disease name] may be classified as either acute or chronic.
 
OR
 
If the staging system involves specific and characteristic findings and features:
According to the [staging system + reference], there are [number] stages of [malignancy name] based on the [finding1], [finding2], and [finding3]. Each stage is assigned a [letter/number1] and a [letter/number2] that designate the [feature1] and [feature2].
 
OR
 
The staging of [malignancy name] is based on the [staging system].
 
OR
 
There is no established system for the staging of [malignancy name].


==Classification==
==Classification==
[[Irritable bowel syndrome|Irritable bowel syndrome (IBS)]] may be classified according to Rome IV [[Criterion|criteria]] into 4 sub-types based on predominant type of [[bowel]] habits:<ref name="pmid15862928">{{cite journal |vauthors=Longstreth GF |title=Definition and classification of irritable bowel syndrome: current consensus and controversies |journal=Gastroenterol. Clin. North Am. |volume=34 |issue=2 |pages=173–87 |year=2005 |pmid=15862928 |doi=10.1016/j.gtc.2005.02.011 |url=}}</ref><ref name="pmid25731138">{{cite journal |vauthors=Sayuk GS, Gyawali CP |title=Irritable bowel syndrome: modern concepts and management options |journal=Am. J. Med. |volume=128 |issue=8 |pages=817–27 |year=2015 |pmid=25731138 |doi=10.1016/j.amjmed.2015.01.036 |url=}}</ref><ref name="pmid26929659">{{cite journal |vauthors=Lacy BE |title=Diagnosis and treatment of diarrhea-predominant irritable bowel syndrome |journal=Int J Gen Med |volume=9 |issue= |pages=7–17 |year=2016 |pmid=26929659 |pmc=4755466 |doi=10.2147/IJGM.S93698 |url=}}</ref><ref name="pmid20502449">{{cite journal |vauthors=Wong RK, Palsson OS, Turner MJ, Levy RL, Feld AD, von Korff M, Whitehead WE |title=Inability of the Rome III criteria to distinguish functional constipation from constipation-subtype irritable bowel syndrome |journal=Am. J. Gastroenterol. |volume=105 |issue=10 |pages=2228–34 |year=2010 |pmid=20502449 |pmc=3786710 |doi=10.1038/ajg.2010.200 |url=}}</ref><ref name="pmid10457044">{{cite journal |vauthors=Thompson WG, Longstreth GF, Drossman DA, Heaton KW, Irvine EJ, Müller-Lissner SA |title=Functional bowel disorders and functional abdominal pain |journal=Gut |volume=45 Suppl 2 |issue= |pages=II43–7 |year=1999 |pmid=10457044 |pmc=1766683 |doi= |url=}}</ref><ref name="pmid12241674">{{cite journal |vauthors=Talley NJ, Spiller R |title=Irritable bowel syndrome: a little understood organic bowel disease? |journal=Lancet |volume=360 |issue=9332 |pages=555–64 |year=2002 |pmid=12241674 |doi=10.1016/S0140-6736(02)09712-X |url=}}</ref>
* [[Irritable bowel syndrome|IBS]] with predominant [[constipation]]
* [[Irritable bowel syndrome|IBS]] with predominant [[diarrhea]]
* [[Irritable bowel syndrome|IBS]] with mixed [[Intestine|bowel]] habits:
** Alternating patterns of [[stool]] passage which is not in conjuncture with the normal [[Bowel movement|bowel movements]].
* [[Irritable bowel syndrome|IBS]] unclassified:
** Patients who meet the diagnostic criteria for [[Irritable bowel syndrome|IBS]] but whose bowel habits do not fit into any of the above subtypes.


*There is no established system for the classification of [disease name].
* Post [[Infection|infectious]] IBS (PI-IBS):
OR
** Post-infectious IBS is an additional sub-type that is [[Acute (medicine)|acute]] in onset and occurs subsequent to an [[Infection|infectious]] illness of the [[gastrointestinal tract]]. Post-infectious IBS is characterized by two or more of the following:<ref name="pmid12776965">{{cite journal |vauthors=Holten KB, Wetherington A, Bankston L |title=Diagnosing the patient with abdominal pain and altered bowel habits: is it irritable bowel syndrome? |journal=Am Fam Physician |volume=67 |issue=10 |pages=2157–62 |year=2003 |pmid=12776965 |doi= |url=}}</ref>
*[Disease name] may be classified according to [classification method] into [number] subtypes/groups:
*** [[Vomiting]]
**[Group1]
*** [[Fever]]
**[Group2]
*** Positive [[stool culture]]  
**[Group3]
*** [[Diarrhea]]
**[Group4]
{| class="wikitable"
OR
! style="background:#4479BA; color: #FFFFFF;" ! |SUBTYPE
*[Disease name] may be classified into [large number > 6] subtypes based on:  
! style="background:#4479BA; color: #FFFFFF;" ! |HARD OR LUMPY STOOLS
**[Classification method 1]
! style="background:#4479BA; color: #FFFFFF;" ! |LOOSE (MUSHY) OR WATERY STOOLS
**[Classification method 2]
|-
**[Classification method 3]
| style="background:#DCDCDC;" align="center" |IBS with [[constipation]]
*[Disease name] may be classified into several subtypes based on:
|≥ 25 percent
**[Classification method 1]
| ≤ 25 percent
**[Classification method 2]
|-
**[Classification method 3]
| style="background:#DCDCDC;" align="center" |IBS with [[diarrhea]]
OR
| ≤ 25 percent
*Based on the duration of symptoms, [disease name] may be classified as either acute or chronic.
|≥ 25 percent
OR
|-
*If the staging system involves specific and characteristic findings and features:
| style="background:#DCDCDC;" align="center" |Mixed IBS
*According to the [staging system + reference], there are [number] stages of [malignancy name] based on the [finding1], [finding2], and [finding3]. Each stage is assigned a [letter/number1] and a [letter/number2] that designate the [feature1] and [feature2].
|≥ 25 percent
OR
|≥ 25 percent
*The staging of [malignancy name] is based on the [staging system].
|-
OR
| style="background:#DCDCDC;" align="center" |Unsubtyped IBS
*There is no established system for the staging of [malignancy name].
| colspan="2" |Insufficient abnormality of [[Human feces|stool]] consistency to meet criteria for IBS with [[constipation]], [[diarrhea]], or mixed subtypes.
|}


==References==
==References==

Latest revision as of 22:12, 1 December 2017

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

Overview

Irritable bowel syndrome (IBS) may be classified according to Rome IV criteria into IBS with predominant constipation , IBS with predominant diarrhea, IBS with mixed bowel habits, and unclassified IBS. In addition, IBS occurring subsequent to gastrointestinal infections is known as post infectious-IBS (PI-IBS). The rationale behind these different sub-types is to maintain consistency of patient selection. This increases understanding of pathophysiological mechanisms, aids in effective diagnosis, treatment, and patient recruitment for clinical trials.

Classification

Irritable bowel syndrome (IBS) may be classified according to Rome IV criteria into 4 sub-types based on predominant type of bowel habits:[1][2][3][4][5][6]

  • IBS with predominant constipation
  • IBS with predominant diarrhea
  • IBS with mixed bowel habits:
  • IBS unclassified:
    • Patients who meet the diagnostic criteria for IBS but whose bowel habits do not fit into any of the above subtypes.
SUBTYPE HARD OR LUMPY STOOLS LOOSE (MUSHY) OR WATERY STOOLS
IBS with constipation ≥ 25 percent  ≤ 25 percent
IBS with diarrhea  ≤ 25 percent ≥ 25 percent
Mixed IBS ≥ 25 percent ≥ 25 percent
Unsubtyped IBS Insufficient abnormality of stool consistency to meet criteria for IBS with constipation, diarrhea, or mixed subtypes.

References

  1. ↑ Longstreth GF (2005). "Definition and classification of irritable bowel syndrome: current consensus and controversies". Gastroenterol. Clin. North Am. 34 (2): 173–87. doi:10.1016/j.gtc.2005.02.011. PMID 15862928.
  2. ↑ Sayuk GS, Gyawali CP (2015). "Irritable bowel syndrome: modern concepts and management options". Am. J. Med. 128 (8): 817–27. doi:10.1016/j.amjmed.2015.01.036. PMID 25731138.
  3. ↑ Lacy BE (2016). "Diagnosis and treatment of diarrhea-predominant irritable bowel syndrome". Int J Gen Med. 9: 7–17. doi:10.2147/IJGM.S93698. PMC 4755466. PMID 26929659.
  4. ↑ Wong RK, Palsson OS, Turner MJ, Levy RL, Feld AD, von Korff M, Whitehead WE (2010). "Inability of the Rome III criteria to distinguish functional constipation from constipation-subtype irritable bowel syndrome". Am. J. Gastroenterol. 105 (10): 2228–34. doi:10.1038/ajg.2010.200. PMC 3786710. PMID 20502449.
  5. ↑ Thompson WG, Longstreth GF, Drossman DA, Heaton KW, Irvine EJ, Müller-Lissner SA (1999). "Functional bowel disorders and functional abdominal pain". Gut. 45 Suppl 2: II43–7. PMC 1766683. PMID 10457044.
  6. ↑ Talley NJ, Spiller R (2002). "Irritable bowel syndrome: a little understood organic bowel disease?". Lancet. 360 (9332): 555–64. doi:10.1016/S0140-6736(02)09712-X. PMID 12241674.
  7. ↑ Holten KB, Wetherington A, Bankston L (2003). "Diagnosing the patient with abdominal pain and altered bowel habits: is it irritable bowel syndrome?". Am Fam Physician. 67 (10): 2157–62. PMID 12776965.

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