Vascular malformations - Revision history

Michael: /* Microscopic */

2021-08-30T14:39:51Z

Microscopic

← Older revision		Revision as of 14:39, 30 August 2021
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	DDx:		DDx:
			*[[Angioleiomyoma]].
	*Other vascular lesions.		*Other vascular lesions.

Jensflorian: cat

2019-10-14T13:12:40Z

cat

← Older revision		Revision as of 13:12, 14 October 2019
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	{{Reflist\|2}}		{{Reflist\|2}}

			[[Category:Malformation]]
	[[Category:Cardiovascular pathology]]		[[Category:Cardiovascular pathology]]
	[[Category:Neuropathology]]		[[Category:Neuropathology]]

Jensflorian: update, capillary teleangiectasia added

2015-12-07T15:02:49Z

update, capillary teleangiectasia added

← Older revision		Revision as of 15:02, 7 December 2015
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	#Venous angioma.		#Venous angioma.
	#*Many small veins.		#*Many small veins.
	#~~Caverous malformation~~.		#Cavernous hemangioma (Cavernoma).
	#*Vessels are back-to-back (no intervening parenchyma).		#*Vessels are back-to-back (no intervening parenchyma).
			#Capillary teleangiectasia
			#*Small capillaries

	Also see: ''[[Sturge-Weber syndrome]]''.		Also see: ''[[Sturge-Weber syndrome]]''.
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	</pre>		</pre>

	==Cavernous ~~angioma~~==
			==Cavernous hemangioma==
	===General===		===General===
	*Usually diagnosed by radiology.		*Usually diagnosed by radiology.
			*Clinicians call it cavernoma.

	===Microscopic===		===Microscopic===
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	*Vessels back-to-back/little intervening parenchyma.		*Vessels back-to-back/little intervening parenchyma.
	**Muscle is absent in the vessel walls - '''key feature'''.<ref>MUN. 23 November 2010.</ref>		**Muscle is absent in the vessel walls - '''key feature'''.<ref>MUN. 23 November 2010.</ref>

			Images:
			<gallery>
			File:Cavernous hemangioma.jpg \| Cavernous hemangioma (WC/Patho82).
			File:Cavernous liver hemangioma - intermed mag.jpg \| Cavernous hemangioma of the liver (WC).
			</gallery>


			==Venous angioma==
			===General===
			*Subcortical white matter.
			*Most common vascular malformation found at autopsy.

			===Gross===
			*May look like petechial hemorrhages.

			===Microscopy===
			*Thin walled, dilated vascular channels.
			*Lesions larger than capillary teleangiectasia.


	==Cherry angioma==		==Cherry angioma==
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	*[http://www.dermpathexpert.com/id30.html Cherry hemangioma (dermpathexpert.com)].		*[http://www.dermpathexpert.com/id30.html Cherry hemangioma (dermpathexpert.com)].
	*[http://missinglink.ucsf.edu/lm/DermatologyGlossary/img/Dermatology%20Glossary/Glossary%20Histo%20Images/cherry_angioma_mid_power.jpg Cherry angioma (ucsf.edu)].<ref name=ucsf_ca>URL:: [http://missinglink.ucsf.edu/lm/DermatologyGlossary/cherry_angioma.html http://missinglink.ucsf.edu/lm/DermatologyGlossary/cherry_angioma.html]. Accessed on: 13 August 2012.</ref>		*[http://missinglink.ucsf.edu/lm/DermatologyGlossary/img/Dermatology%20Glossary/Glossary%20Histo%20Images/cherry_angioma_mid_power.jpg Cherry angioma (ucsf.edu)].<ref name=ucsf_ca>URL:: [http://missinglink.ucsf.edu/lm/DermatologyGlossary/cherry_angioma.html http://missinglink.ucsf.edu/lm/DermatologyGlossary/cherry_angioma.html]. Accessed on: 13 August 2012.</ref>


			==Capillary teleangiectasia==
			*Usually incidental finding at autopsy.
			*Pons as predilection site.

			===Microscopy===
			*Many small, thin walled capillaries surrounded by normal brain.
			*No hemorrhage.

			Images:
			<gallery>
			File:Teleangiectasia brain.jpg \| CNS teleangiectasia
			</gallery>

	==See also==		==See also==

Michael: /* Gross */

2013-09-04T08:08:10Z

Gross

← Older revision		Revision as of 08:08, 4 September 2013
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	Image:		Image:
	*[http://www.flickr.com/photos/11462589@N05/1125883661/in/photostream/ AVM (flickr.com)].		*[http://www.flickr.com/photos/11462589@N05/1125883661/in/photostream/ AVM (flickr.com)].

			Clinical DDx:
			*Melanocytic lesion.
			*Other vascular lesions.

	===Microscopic===		===Microscopic===

Michael: /* Microscopic */

2013-09-04T08:07:41Z

Microscopic

← Older revision		Revision as of 08:07, 4 September 2013
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	*Arteries have a well-defined internal elastic lamina and an external elastic lamina (best seen on elastic trichrome).		*Arteries have a well-defined internal elastic lamina and an external elastic lamina (best seen on elastic trichrome).
	**[[Vein]]s do not have an external elastic lamina and have a poorly developed/thin internal elastic lamina.		**[[Vein]]s do not have an external elastic lamina and have a poorly developed/thin internal elastic lamina.

			DDx:
			*Other vascular lesions.

	====Images====		====Images====

Michael: /* Microscopic */

2013-09-04T08:07:08Z

Microscopic

← Older revision		Revision as of 08:07, 4 September 2013
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	**"Large" = ~ 0.5 mm (0.25-1.0 mm).		**"Large" = ~ 0.5 mm (0.25-1.0 mm).
	***0.25 mm = ~ 31 RBC diameters across.		***0.25 mm = ~ 31 RBC diameters across.

	~~Images:~~
	*[[WC]]:
	**[http://commons.wikimedia.org/wiki/File:Arteriovenous_malformation_-_brain_-_low_mag.jpg Cerebral AVM (WC)].
	*www:
	**[http://path.upmc.edu/cases/case123.html AVM - several images (upmc.edu)].

	Notes:		Notes:
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	*Arteries have a well-defined internal elastic lamina and an external elastic lamina (best seen on elastic trichrome).		*Arteries have a well-defined internal elastic lamina and an external elastic lamina (best seen on elastic trichrome).
	**[[Vein]]s do not have an external elastic lamina and have a poorly developed/thin internal elastic lamina.		**[[Vein]]s do not have an external elastic lamina and have a poorly developed/thin internal elastic lamina.

			====Images====
			<gallery>
			Image:Arteriovenous_malformation_-_brain_-_low_mag.jpg \| Cerebral AVM. (WC)
			</gallery>
			www:
			*[http://path.upmc.edu/cases/case123.html AVM - several images (upmc.edu)].

	===Sign out===		===Sign out===

Michael: /* Sign out */

2013-09-04T08:01:06Z

Sign out

← Older revision		Revision as of 08:01, 4 September 2013
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	===Sign out===		===Sign out===
			<pre>
			ANUS, BIOPSY:
			- ARTERIOVENOUS MALFORMATION (PROMINENT SUPERFICIAL DERMAL ARTERIES AND VEINS).
			- SKIN WITH PARAKERATOSIS.
			- NEGATIVE FOR MELANOCYTIC LESION.
			- NEGATIVE FOR MALIGNANCY.
			</pre>

	<pre>		<pre>
	ANUS, BIOPSY:		ANUS, BIOPSY:

Michael: /* Arteriovenous malformation */ tweak

2013-09-04T07:54:03Z

Arteriovenous malformation: tweak

← Older revision		Revision as of 07:54, 4 September 2013
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	*Arteries have a well-defined internal elastic lamina and an external elastic lamina (best seen on elastic trichrome).		*Arteries have a well-defined internal elastic lamina and an external elastic lamina (best seen on elastic trichrome).
	**[[Vein]]s do not have an external elastic lamina and have a poorly developed/thin internal elastic lamina.		**[[Vein]]s do not have an external elastic lamina and have a poorly developed/thin internal elastic lamina.

			===Sign out===
			<pre>
			ANUS, BIOPSY:
			- SKIN WITH PARAKERATOSIS.
			- PROMINENT SUPERFICIAL DERMAL ARTERIES AND VEINS -- COMPATIBLE WITH
			ARTERIOVENOUS MALFORMATION.
			- NEGATIVE FOR MELANOCYTIC LESION.
			- NEGATIVE FOR MALIGNANCY.
			</pre>

	==Cavernous angioma==		==Cavernous angioma==

Michael: /* Microscopic */ more

2013-07-03T11:43:40Z

Microscopic: more

← Older revision		Revision as of 11:43, 3 July 2013
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	DDx:		DDx:
	*[[Venous lake]] - single vessel.<ref name=Ref_Derm551>{{Ref Derm\|551}}</ref>		*[[Venous lake]] - single vessel.<ref name=Ref_Derm551>{{Ref Derm\|551}}</ref>
			*[[Hemangioma]].

	Images:		Images:

Michael: /* Arteriovenous malformation */ +abbrev.

2012-11-16T02:25:24Z

Arteriovenous malformation: +abbrev.

← Older revision		Revision as of 02:25, 16 November 2012
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	==Arteriovenous malformation==		==Arteriovenous malformation==
			*Abbreviated ''AVM''.
	===General===		===General===
	*High risk for bleeding vis-a-vis other vascular malformations.		*High risk for bleeding vis-a-vis other vascular malformations.