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==Overview==
==Classification==
There is no established system for the classification of Angiodysplasia.
One system of classification is based on location, size, and number of angiodysplasias. <ref name="pmid9852467">{{cite journal| author=Schmit A, Van Gossum A| title=Proposal for an endoscopic classification of digestive angiodysplasias for therapeutic trials. The European Club of Enteroscopy. | journal=Gastrointest Endosc | year= 1998 | volume= 48 | issue= 6 | pages= 659 | pmid=9852467 | doi=10.1016/s0016-5107(98)70080-x | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=9852467  }} </ref>
{| class="wikitable"
|+Classification of gastrointestinal angiodysplasia
!Location
!Size
!Number of lesions
|-
|Gastric
|Minute (<2 mm in diameter)
|Unique (n = 1)
|-
|Duodenal
|Intermediate (2 to 5 mm)
|Multiple (n = 2 to 10)
|-
|Jejunal
|Large (>5 mm)
|Diffuse (n > 10)
|-
|Colonic
|
|
|-
| colspan="3" |For example, "D-S2-N3" signifies multiple angiodysplasias of intermediate size in the duodenum.
|}
Another system of classification uses endoscopic techniques to classify angiodysplasia depending on size, bleeding and surrounding venous dilatation. <ref name="pmid18155439">{{cite journal| author=Yano T, Yamamoto H, Sunada K, Miyata T, Iwamoto M, Hayashi Y | display-authors=etal| title=Endoscopic classification of vascular lesions of the small intestine (with videos). | journal=Gastrointest Endosc | year= 2008 | volume= 67 | issue= 1 | pages= 169-72 | pmid=18155439 | doi=10.1016/j.gie.2007.08.005 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=18155439  }} </ref>


OR
Type 1: Angioectasias:


Angiodysplasia may be classified according to endoscopic appearance  into 4 subtypes: Type 1, Type 2, Type 3, and Type 4.
Type 1 a - punctulate erythema (< 1 mm), with or without oozing


OR
Type 1 b - patchy erythema (a few mm), with or without oozing


[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].
Type 2: Dieulafoy's lesions:


OR
Type 2 a - punctulate lesions (< 1 mm), with pulsatile bleeding


Based on the duration of symptoms, [disease name] may be classified as either acute or chronic.
Type 2b - pulsatile red protrusion, without surrounding venous dilatation


OR
Type 3 - pulsatile red protrusion, with surrounding venous dilatation


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].
Type 4 - other lesions not classified into any of the above categories.
 
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
 
There is no established system for the classification of [disease name].
 
OR
 
[Disease name] may be classified according to [classification method] into [number] subtypes/groups:
 
[Group1]
 
[Group2]
 
[Group3]
 
[Group4]
 
OR
 
[Disease name] may be classified into [large number > 6] subtypes based on:
 
[Classification method 1]
 
[Classification method 2]
 
[Classification method 3]
 
[Disease name] may be classified into several subtypes based on:
 
[Classification method 1]
 
[Classification method 2]
 
[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==

Revision as of 20:15, 3 September 2021

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

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Classification

One system of classification is based on location, size, and number of angiodysplasias. [1]

Classification of gastrointestinal angiodysplasia
Location Size Number of lesions
Gastric Minute (<2 mm in diameter) Unique (n = 1)
Duodenal Intermediate (2 to 5 mm) Multiple (n = 2 to 10)
Jejunal Large (>5 mm) Diffuse (n > 10)
Colonic
For example, "D-S2-N3" signifies multiple angiodysplasias of intermediate size in the duodenum.

Another system of classification uses endoscopic techniques to classify angiodysplasia depending on size, bleeding and surrounding venous dilatation. [2]

Type 1: Angioectasias:

Type 1 a - punctulate erythema (< 1 mm), with or without oozing

Type 1 b - patchy erythema (a few mm), with or without oozing

Type 2: Dieulafoy's lesions:

Type 2 a - punctulate lesions (< 1 mm), with pulsatile bleeding

Type 2b - pulsatile red protrusion, without surrounding venous dilatation

Type 3 - pulsatile red protrusion, with surrounding venous dilatation

Type 4 - other lesions not classified into any of the above categories.

Classification

Type 1: Angioectasias: Punctate erythema with/ without oozing

Type 2: Dieulafoy's lesions: Punctate lesions with pulsatile bleeding

Type3: AV malformations : Pulsatile red protrusion, without surrounding venous dilation

Type 4: Unclassifiable : Lesions that cannot be classified in one of the above categories.

References

  1. ↑ Schmit A, Van Gossum A (1998). "Proposal for an endoscopic classification of digestive angiodysplasias for therapeutic trials. The European Club of Enteroscopy". Gastrointest Endosc. 48 (6): 659. doi:10.1016/s0016-5107(98)70080-x. PMID 9852467.
  2. ↑ Yano T, Yamamoto H, Sunada K, Miyata T, Iwamoto M, Hayashi Y; et al. (2008). "Endoscopic classification of vascular lesions of the small intestine (with videos)". Gastrointest Endosc. 67 (1): 169–72. doi:10.1016/j.gie.2007.08.005. PMID 18155439.

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