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__NOTOC__
__NOTOC__
 
{{SI}}
{{CMG}} {{shyam}}; {{AE}} {{M.B}}
{{CMG}} {{shyam}}; {{AE}} {{M.B}}<br>
{{SK}}  Hemangiosarcoma; Pulmonary angiosarcoma; Vascular sarcoma  
{{SK}}  Hemangiosarcoma; Pulmonary angiosarcoma; Vascular sarcoma  
==Overview==
==Overview==
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[[Angiosarcoma]] was first discovered by Dr. Juan Rosai, M.D. and colleagues in 1976.<ref name="pmid24946325">{{cite journal |vauthors=Barber W, Scriven P, Turner D, Hughes D, Wyld D |title=Epithelioid angiosarcoma: Use of angiographic embolisation and radiotherapy to control recurrent haemorrhage |journal=J Surg Case Rep |volume=2010 |issue=5 |pages=7 |year=2010 |pmid=24946325 |pmc=3649120 |doi=10.1093/jscr/2010.5.7 |url=}}</ref>  
[[Angiosarcoma]] was first discovered by Dr. Juan Rosai, M.D. and colleagues in 1976.<ref name="pmid24946325">{{cite journal |vauthors=Barber W, Scriven P, Turner D, Hughes D, Wyld D |title=Epithelioid angiosarcoma: Use of angiographic embolisation and radiotherapy to control recurrent haemorrhage |journal=J Surg Case Rep |volume=2010 |issue=5 |pages=7 |year=2010 |pmid=24946325 |pmc=3649120 |doi=10.1093/jscr/2010.5.7 |url=}}</ref>  
==Classification==
==Classification==
*Angiosarcoma may be [[classification|classified]] according to the clinical heterogeneity into two main groups, and every group can be subdivided into subtypes according to the anatomical location and etiology:<ref>{{Cite journal
*Angiosarcoma may be [[classification|classified]] according to the clinical heterogeneity into two main groups, and every group can be subdivided into subtypes according to the anatomical location and etiology:<ref name="pmid16053668">{{cite journal |vauthors=Fury MG, Antonescu CR, Van Zee KJ, Brennan MF, Maki RG |title=A 14-year retrospective review of angiosarcoma: clinical characteristics, prognostic factors, and treatment outcomes with surgery and chemotherapy |journal=Cancer J |volume=11 |issue=3 |pages=241–7 |date=2005 |pmid=16053668 |doi= |url=}}</ref><ref name="pmid18771914">{{cite journal |vauthors=Schlemmer M, Reichardt P, Verweij J, Hartmann JT, Judson I, Thyss A, Hogendoorn PC, Marreaud S, Van Glabbeke M, Blay JY |title=Paclitaxel in patients with advanced angiosarcomas of soft tissue: a retrospective study of the EORTC soft tissue and bone sarcoma group |journal=Eur. J. Cancer |volume=44 |issue=16 |pages=2433–6 |date=November 2008 |pmid=18771914 |doi=10.1016/j.ejca.2008.07.037 |url=}}</ref><ref name="pmid25532684">{{cite journal |vauthors=Karanian M, Coindre JM |title=[Fourth edition of WHO classification tumours of soft tissue] |language=French |journal=Ann Pathol |volume=35 |issue=1 |pages=71–85 |date=January 2015 |pmid=25532684 |doi=10.1016/j.annpat.2014.11.003 |url=}}</ref>
| author = [[Matthew G. Fury]], [[Cristina R. Antonescu]], [[Kimberly J. Van Zee]], [[Murray F. Brennan]] & [[Robert G. Maki]]
| title = A 14-year retrospective review of angiosarcoma: clinical characteristics, prognostic factors, and treatment outcomes with surgery and chemotherapy
| journal = [[Cancer journal (Sudbury, Mass.)]]
| volume = 11
| issue = 3
| pages = 241–247
| year = 2005
| month = May-June
| pmid = 16053668
}}</ref>
<ref>{{Cite journal
| author = [[M. Schlemmer]], [[P. Reichardt]], [[J. Verweij]], [[J. T. Hartmann]], [[I. Judson]], [[A. Thyss]], [[P. C. W. Hogendoorn]], [[S. Marreaud]], [[M. Van Glabbeke]] & [[J. Y. Blay]]
| title = Paclitaxel in patients with advanced angiosarcomas of soft tissue: a retrospective study of the EORTC soft tissue and bone sarcoma group
| journal = [[European journal of cancer (Oxford, England : 1990)]]
| volume = 44
| issue = 16
| pages = 2433–2436
| year = 2008
| month = November
| doi = 10.1016/j.ejca.2008.07.037
| pmid = 18771914
}}</ref><ref>{{Cite journal
| author = [[Marie Karanian]] & [[Jean-Michel Coindre]]
| title = &#91;Fourth edition of WHO classification tumours of soft tissue&#93;
| journal = [[Annales de pathologie]]
| volume = 35
| issue = 1
| pages = 71–85
| year = 2015
| month = January
| doi = 10.1016/j.annpat.2014.11.003
| pmid = 25532684
}}</ref>  
{| {{table}} cellpadding="4" cellspacing="0" style="border:#c9c9c9 1px solid; margin: 1em 1em 1em 0; border-collapse: collapse;"
{| {{table}} cellpadding="4" cellspacing="0" style="border:#c9c9c9 1px solid; margin: 1em 1em 1em 0; border-collapse: collapse;"
| colspan="2" align="center" style="background-color: #0080FF; font-weight: bold;" | Angiosarcoma   
| colspan="2" align="center" style="background-color: #0080FF; font-weight: bold;" | Angiosarcoma   
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*Exposure to [[arsenic]]-containing [[insecticides]]  
*Exposure to [[arsenic]]-containing [[insecticides]]  
*Previous exposure to [[thorium dioxide]] [[irradiation]]
*Previous exposure to [[thorium dioxide]] [[irradiation]]
==Differentiating Angiosarcoma from Other Diseases==
==Differentiating Angiosarcoma from Other Diseases==
Angiosarcoma must be differentiated from other diseases that cause a highly vascular mass or non-healing cutaneous ulcerations such as:
Angiosarcoma must be differentiated from other diseases that cause a highly vascular mass or non-healing cutaneous ulcerations such as:
===Differentials for Cutaneous Angiosarcoma===
===Differentials for Cutaneous Angiosarcoma===
Cutaneous angiosarcoma must be differentiated from other diseases with non-healing cutaneous ulcerations such as:<ref>{{Cite journal
Cutaneous angiosarcoma must be differentiated from other diseases with non-healing cutaneous ulcerations such as:<ref name="pmid9640382">{{cite journal |vauthors=Sinclair SA, Sviland L, Natarajan S |title=Angiosarcoma arising in a chronically lymphoedematous leg |journal=Br. J. Dermatol. |volume=138 |issue=4 |pages=692–4 |date=April 1998 |pmid=9640382 |doi=10.1046/j.1365-2133.1998.02188.x |url=}}</ref><ref name="pmid18307140">{{cite journal |vauthors=de Keizer RJ, de Wolff-Rouendaal D, Nooy MA |title=Angiosarcoma of the eyelid and periorbital region. Experience in Leiden with iridium192 brachytherapy and low-dose doxorubicin chemotherapy |journal=Orbit |volume=27 |issue=1 |pages=5–12 |date=2008 |pmid=18307140 |doi=10.1080/01676830601168926 |url=}}</ref><ref name="pmid25484419">{{cite journal |vauthors=Vora R, Anjaneyan G, Gupta R |title=Cutaneous angiosarcoma of head and neck |journal=Indian J Dermatol |volume=59 |issue=6 |pages=632 |date=November 2014 |pmid=25484419 |pmc=4248527 |doi=10.4103/0019-5154.143575 |url=}}</ref>
| author = [[S. A. Sinclair]], [[L. Sviland]] & [[S. Natarajan]]
| title = Angiosarcoma arising in a chronically lymphoedematous leg
| journal = [[The British journal of dermatology]]
| volume = 138
| issue = 4
| pages = 692–694
| year = 1998
| month = April
| pmid = 9640382
}}</ref><ref>{{Cite journal
| author = [[R. J. W. de Keizer]], [[D. de Wolff-Rouendaal]] & [[M. A. Nooy]]
| title = Angiosarcoma of the eyelid and periorbital region. Experience in Leiden with iridium192 brachytherapy and low-dose doxorubicin chemotherapy
| journal = [[Orbit (Amsterdam, Netherlands)]]
| volume = 27
| issue = 1
| pages = 5–12
| year = 2008
| month =  
| doi = 10.1080/01676830601168926
| pmid = 18307140
}}</ref><ref>{{Cite journal
| author = [[Rita Vora]], [[Gopikrishnan Anjaneyan]] & [[Rajat Gupta]]
| title = Cutaneous angiosarcoma of head and neck
| journal = [[Indian journal of dermatology]]
| volume = 59
| issue = 6
| pages = 632
| year = 2014
| month = November
| doi = 10.4103/0019-5154.143575
| pmid = 25484419
}}</ref>
:*[[Basal cell carcinoma]]
:*[[Basal cell carcinoma]]
:*[[Keratoacanthoma]]
:*[[Keratoacanthoma]]
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:*Kaposi-like hemangioendothelioma  
:*Kaposi-like hemangioendothelioma  
:*Angiolymphoid hyperplasia
:*Angiolymphoid hyperplasia
===Differentials for Non-cutaneous Angiosarcoma===
===Differentials for Non-cutaneous Angiosarcoma===
Angiosarcoma must be differentiated from other diseases that cause a highly vascular mass such as:<ref>{{Cite journal
Angiosarcoma must be differentiated from other diseases that cause a highly vascular mass such as:<ref name="pmid1718176">{{cite journal |vauthors=Fletcher CD, Beham A, Bekir S, Clarke AM, Marley NJ |title=Epithelioid angiosarcoma of deep soft tissue: a distinctive tumor readily mistaken for an epithelial neoplasm |journal=Am. J. Surg. Pathol. |volume=15 |issue=10 |pages=915–24 |date=October 1991 |pmid=1718176 |doi=10.1097/00000478-199110000-00001 |url=}}</ref>
| author = [[C. D. Fletcher]], [[A. Beham]], [[S. Bekir]], [[A. M. Clarke]] & [[N. J. Marley]]
| title = Epithelioid angiosarcoma of deep soft tissue: a distinctive tumor readily mistaken for an epithelial neoplasm
| journal = [[The American journal of surgical pathology]]
| volume = 15
| issue = 10
| pages = 915–924
| year = 1991
| month = October
| pmid = 1718176
}}</ref>
:*Atypical vascular lesions
:*Atypical vascular lesions
:*[[Hemangioma]]
:*[[Hemangioma]]
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:*[[Carotid body tumor]]
:*[[Carotid body tumor]]
:*[[Malignant fibrous histiocytoma]] of soft tissue
:*[[Malignant fibrous histiocytoma]] of soft tissue
==Epidemiology and Demographics==
==Epidemiology and Demographics==
 
*In general 2% of soft tissue sarcomas are angiosarcomas, and the incidence of soft tissue sarcoma is about 6 per 100,000 person; on the other words,the incidence of angiosarcomas can be calculated approximately 1.2 per 1,000.000 person.<ref name="pmid20537949">{{cite journal |vauthors=Young RJ, Brown NJ, Reed MW, Hughes D, Woll PJ |title=Angiosarcoma |journal=Lancet Oncol. |volume=11 |issue=10 |pages=983–91 |date=October 2010 |pmid=20537949 |doi=10.1016/S1470-2045(10)70023-1 |url=}}</ref><ref name="pmid21793180">{{cite journal |vauthors=Ferrari A, Sultan I, Huang TT, Rodriguez-Galindo C, Shehadeh A, Meazza C, Ness KK, Casanova M, Spunt SL |title=Soft tissue sarcoma across the age spectrum: a population-based study from the Surveillance Epidemiology and End Results database |journal=Pediatr Blood Cancer |volume=57 |issue=6 |pages=943–9 |date=December 2011 |pmid=21793180 |pmc=4261144 |doi=10.1002/pbc.23252 |url=}}</ref>
*In general 2% of soft tissue sarcomas are angiosarcomas, and the incidence of soft tissue sarcoma is about 6 per 100,000 person; on the other words,the incidence of angiosarcomas can be calculated approximately 1.2 per 1,000.000 person.<ref>{{Cite journal
| author = [[Robin J. Young]], [[Nicola J. Brown]], [[Malcolm W. Reed]], [[David Hughes]] & [[Penella J. Woll]]
| title = Angiosarcoma
| journal = [[The Lancet. Oncology]]
| volume = 11
| issue = 10
| pages = 983–991
| year = 2010
| month = October
| doi = 10.1016/S1470-2045(10)70023-1
| pmid = 20537949
}}</ref><ref>{{Cite journal
| author = [[Andrea Ferrari]], [[Iyad Sultan]], [[Tseng Tien Huang]], [[Carlos Rodriguez-Galindo]], [[Ahmad Shehadeh]], [[Cristina Meazza]], [[Kirsten K. Ness]], [[Michela Casanova]] & [[Sheri L. Spunt]]
| title = Soft tissue sarcoma across the age spectrum: a population-based study from the Surveillance Epidemiology and End Results database
| journal = [[Pediatric blood & cancer]]
| volume = 57
| issue = 6
| pages = 943–949
| year = 2011
| month = December
| doi = 10.1002/pbc.23252
| pmid = 21793180
}}</ref>
 
*Angiosarcoma is more commonly observed among patients aged between 40 to 75 years old.The peak age of incidence appears is the 7th decade,<ref name="angio">Sturgis EM, Potter BO. Sarcomas of the head and neck region. Curr Opin Oncol. 2003 May. 15(3):239-52</ref>
*Angiosarcoma is more commonly observed among patients aged between 40 to 75 years old.The peak age of incidence appears is the 7th decade,<ref name="angio">Sturgis EM, Potter BO. Sarcomas of the head and neck region. Curr Opin Oncol. 2003 May. 15(3):239-52</ref>
*Males are more commonly affected with angiosarcoma than females.<ref name="angio">Sturgis EM, Potter BO. Sarcomas of the head and neck region. Curr Opin Oncol. 2003 May. 15(3):239-52</ref>
*Males are more commonly affected with angiosarcoma than females.<ref name="angio">Sturgis EM, Potter BO. Sarcomas of the head and neck region. Curr Opin Oncol. 2003 May. 15(3):239-52</ref>
*The male to female ratio is 2:1.<ref name="angio">Sturgis EM, Potter BO. Sarcomas of the head and neck region. Curr Opin Oncol. 2003 May. 15(3):239-52</ref>
*The male to female ratio is 2:1.<ref name="angio">Sturgis EM, Potter BO. Sarcomas of the head and neck region. Curr Opin Oncol. 2003 May. 15(3):239-52</ref>
 
*There is no racial predilection for angiosarcoma. however, African-Americans in the U.S are rarely affected.<ref name="pmid12778019">{{cite journal |vauthors=Sturgis EM, Potter BO |title=Sarcomas of the head and neck region |journal=Curr Opin Oncol |volume=15 |issue=3 |pages=239–52 |date=May 2003 |pmid=12778019 |doi=10.1097/00001622-200305000-00011 |url=}}</ref>
*There is no racial predilection for angiosarcoma. however, African-Americans in the U.S are rarely affected.<ref>{{Cite journal
| author = [[Erich M. Sturgis]] & [[Bryan O. Potter]]
| title = Sarcomas of the head and neck region
| journal = [[Current opinion in oncology]]
| volume = 15
| issue = 3
| pages = 239–252
| year = 2003
| month = May
| pmid = 12778019
}}</ref>
 
==Risk Factors==
==Risk Factors==
Common risk factors in the development of angiosarcoma include:<ref name="pmid20537949">{{cite journal |vauthors=Young RJ, Brown NJ, Reed MW, Hughes D, Woll PJ |title=Angiosarcoma |journal=Lancet Oncol. |volume=11 |issue=10 |pages=983–91 |year=2010 |pmid=20537949 |doi=10.1016/S1470-2045(10)70023-1 |url=}}</ref>
Common risk factors in the development of angiosarcoma include:<ref name="pmid20537949">{{cite journal |vauthors=Young RJ, Brown NJ, Reed MW, Hughes D, Woll PJ |title=Angiosarcoma |journal=Lancet Oncol. |volume=11 |issue=10 |pages=983–91 |year=2010 |pmid=20537949 |doi=10.1016/S1470-2045(10)70023-1 |url=}}</ref>
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*[[Radiation exposure]]
*[[Radiation exposure]]
*Exposure to [[Thorotrast]]
*Exposure to [[Thorotrast]]
== Natural History, Complications and Prognosis==
== Natural History, Complications and Prognosis==
* The majority of patients with angiosarcoma remain asymptomatic for years.<ref name="pmid20537949">{{cite journal |vauthors=Young RJ, Brown NJ, Reed MW, Hughes D, Woll PJ |title=Angiosarcoma |journal=Lancet Oncol. |volume=11 |issue=10 |pages=983–91 |year=2010 |pmid=20537949 |doi=10.1016/S1470-2045(10)70023-1 |url=}}</ref>
* The majority of patients with angiosarcoma remain asymptomatic for years.<ref name="pmid20537949">{{cite journal |vauthors=Young RJ, Brown NJ, Reed MW, Hughes D, Woll PJ |title=Angiosarcoma |journal=Lancet Oncol. |volume=11 |issue=10 |pages=983–91 |year=2010 |pmid=20537949 |doi=10.1016/S1470-2045(10)70023-1 |url=}}</ref>
* Early clinical features may include nonspecific symptoms, such as [[pain]], [[fatigue]], [[malaise]], and [[nausea]].
* Early clinical features may include nonspecific symptoms, such as [[pain]], [[fatigue]], [[malaise]], and [[nausea]].
* If left untreated, the majority of patients with angiosarcoma may rapidly progress to develop [[metastases]].<ref name="angio">Sturgis EM, Potter BO. Sarcomas of the head and neck region. Curr Opin Oncol. 2003 May. 15(3):239-52</ref>
* If left untreated, the majority of patients with angiosarcoma may rapidly progress to develop [[metastases]].<ref name="angio">Sturgis EM, Potter BO. Sarcomas of the head and neck region. Curr Opin Oncol. 2003 May. 15(3):239-52</ref>
Common complications of angiosarcoma include:<ref name="pmid20537949">{{cite journal |vauthors=Young RJ, Brown NJ, Reed MW, Hughes D, Woll PJ |title=Angiosarcoma |journal=Lancet Oncol. |volume=11 |issue=10 |pages=983–91 |year=2010 |pmid=20537949 |doi=10.1016/S1470-2045(10)70023-1 |url=}}</ref>
Common complications of angiosarcoma include:<ref name="pmid20537949">{{cite journal |vauthors=Young RJ, Brown NJ, Reed MW, Hughes D, Woll PJ |title=Angiosarcoma |journal=Lancet Oncol. |volume=11 |issue=10 |pages=983–91 |year=2010 |pmid=20537949 |doi=10.1016/S1470-2045(10)70023-1 |url=}}</ref>
*[[Fractures|Pathologic fractures]]
*[[Fractures|Pathologic fractures]]
*[[Anemia]]
*[[Anemia]]
*[[Hepatic dysfunction]]
*[[Hepatic dysfunction]]
* Prognosis is generally poor; the 5-­year survival rate of patients with angiosarcoma is approximately 12-33%.  
* Prognosis is generally poor; the 5-­year survival rate of patients with angiosarcoma is approximately 12-33%.  
* Poor prognostic factors include patient age (> 65 years), [[retroperitoneal]] location, and large [[tumor]] size.<ref name="angio">Sturgis EM, Potter BO. Sarcomas of the head and neck region. Curr Opin Oncol. 2003 May. 15(3):239-52</ref>
* Poor prognostic factors include patient age (> 65 years), [[retroperitoneal]] location, and large [[tumor]] size.<ref name="angio">Sturgis EM, Potter BO. Sarcomas of the head and neck region. Curr Opin Oncol. 2003 May. 15(3):239-52</ref>
== Diagnosis ==
== Diagnosis ==
=== Diagnostic Study of Choice ===
=== Diagnostic Study of Choice ===
* There is no single diagnostic study of choice for the diagnosis of angiosarcomas. The imaging modality of choice for angiosarcoma or use of punch biopsy of skin will depend on the anatomic location of lesions.
* There is no single diagnostic study of choice for the diagnosis of angiosarcomas. The imaging modality of choice for angiosarcoma or use of punch biopsy of skin will depend on the anatomic location of lesions.
** Magnetic resonance imaging (MRI) is the imaging modality of choice for evaluating of suspicious lesions of the extremities, retroperitoneum, or abdominal wall.<ref>{{Cite journal
** Magnetic resonance imaging (MRI) is the imaging modality of choice for evaluating of suspicious lesions of the extremities, retroperitoneum, or abdominal wall.<ref name="pmid28471264">{{cite journal |vauthors=Gaballah AH, Jensen CT, Palmquist S, Pickhardt PJ, Duran A, Broering G, Elsayes KM |title=Angiosarcoma: clinical and imaging features from head to toe |journal=Br J Radiol |volume=90 |issue=1075 |pages=20170039 |date=July 2017 |pmid=28471264 |pmc=5594986 |doi=10.1259/bjr.20170039 |url=}}</ref>
| author = [[Ayman H. Gaballah]], [[Corey T. Jensen]], [[Sarah Palmquist]], [[Perry J. Pickhardt]], [[Alper Duran]], [[Gregory Broering]] & [[Khaled M. Elsayes]]
| title = Angiosarcoma: clinical and imaging features from head to toe
| journal = [[The British journal of radiology]]
| volume = 90
| issue = 1075
| pages = 20170039
| year = 2017
| month = July
| doi = 10.1259/bjr.20170039
| pmid = 28471264
}}</ref>
**CT scan is useful in for evaluating of lung, pleural, and mediastinal involvement.  
**CT scan is useful in for evaluating of lung, pleural, and mediastinal involvement.  
**An x-ray may be helpful in the diagnosis of bone angiosarcoma. Findings on an x-ray suggestive of diagnostic include solitary lytic lesion, with irregular borders or a mixed lytic-sclerotic pattern.<ref>{{Cite journal
**An x-ray may be helpful in the diagnosis of bone angiosarcoma. Findings on an x-ray suggestive of diagnostic include solitary lytic lesion, with irregular borders or a mixed lytic-sclerotic pattern.<ref name="pmid11201031">{{cite journal |vauthors=Wenger DE, Wold LE |title=Malignant vascular lesions of bone: radiologic and pathologic features |journal=Skeletal Radiol. |volume=29 |issue=11 |pages=619–31 |date=November 2000 |pmid=11201031 |doi=10.1007/s002560000261 |url=}}</ref>
| author = [[D. E. Wenger]] & [[L. E. Wold]]
**Punch biopsy of cutaneous lsions accompanied with immunohistochemical staining provide accurate findings for diagnosis of cutaneous angiosarcoma. Findings associated with angiosarcoma include irregular anastomosing vascular spaces lined by endothelial cells, and immunohistochemical staining of tumor cells highlights CD31, CD34 and von-Willebrand factor related antigens which define the vascular origin of tumor cells.<ref name="pmid17998731">{{cite journal |vauthors=Mittal S, Goswami C, Kanoria N, Bhattacharya A |title=Post-irradiation angiosarcoma of bone |journal=J Cancer Res Ther |volume=3 |issue=2 |pages=96–9 |date=2007 |pmid=17998731 |doi= |url=}}</ref><ref name="pmid12150140">{{cite journal |vauthors=Kiyohara T, Kumakiri M, Kobayashl H, Itoh K, Lao LM, Ohkawara A, Nakmura H |title=Spindle cell angiosarcoma following irradiation therapy for cervical carcinoma |journal=J. Cutan. Pathol. |volume=29 |issue=2 |pages=96–100 |date=February 2002 |pmid=12150140 |doi=10.1034/j.1600-0560.2002.290206.x |url=}}</ref>
| title = Malignant vascular lesions of bone: radiologic and pathologic features
| journal = [[Skeletal radiology]]
| volume = 29
| issue = 11
| pages = 619–631
| year = 2000
| month = November
| pmid = 11201031
}}</ref>
**Punch biopsy of cutaneous lsions accompanied with immunohistochemical staining provide accurate findings for diagnosis of cutaneous angiosarcoma. Findings associated with angiosarcoma include irregular anastomosing vascular spaces lined by endothelial cells, and immunohistochemical staining of tumor cells highlights CD31, CD34 and von-Willebrand factor related antigens which define the vascular origin of tumor cells.<ref>{{Cite journal
| author = [[Srabani Mittal]], [[Chanchal Goswami]], [[Nandini Kanoria]] & [[Aniruddha Bhattacharya]]
| title = Post-irradiation angiosarcoma of bone
| journal = [[Journal of cancer research and therapeutics]]
| volume = 3
| issue = 2
| pages = 96–99
| year = 2007
| month = April-June
| pmid = 17998731
}}</ref><ref>{{Cite journal
| author = [[Takahiro Kiyohara]], [[Masanobu Kumakiri]], [[Hitoshi Kobayashl]], [[Kei Itoh]], [[Li-Min Lao]], [[Akira Ohkawara]] & [[Hideki Nakmura]]
| title = Spindle cell angiosarcoma following irradiation therapy for cervical carcinoma
| journal = [[Journal of cutaneous pathology]]
| volume = 29
| issue = 2
| pages = 96–100
| year = 2002
| month = February
| pmid = 12150140
}}</ref>
 
=== Staging ===
=== Staging ===
According to the American Joint Committee on Cancer (AJCC)/Union for International Cancer Control (UICC) and by Enneking classification, soft tissue sarcomas are classified to different stages based on the primary tumor characteristics, histological grading and the local or distant tumor involvement. Table below provides summarized information regarding staging of angiosarcoma:<ref>{{Cite journal
According to the American Joint Committee on Cancer (AJCC)/Union for International Cancer Control (UICC) and by Enneking classification, soft tissue sarcomas are classified to different stages based on the primary tumor characteristics, histological grading and the local or distant tumor involvement. Table below provides summarized information regarding staging of angiosarcoma:<ref>{{Cite journal

Revision as of 14:11, 15 October 2019

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Shyam Patel [2]; Associate Editor(s)-in-Chief: Mohsen Basiri M.D.
Synonyms and keywords: Hemangiosarcoma; Pulmonary angiosarcoma; Vascular sarcoma

Overview

Angiosarcoma is a rare malignant vascular neoplasm of endothelial-type cells that line vessel walls. The peak age of incidence appears to be the 7th decade, and men are affected more than women. Angiosarcoma was first described by Dr. Juan Rosai, in 1976. The pathogenesis of angiosarcoma is characterized by a rapid and extensively infiltrating overgrowth of vascular epithelial cells. Angiosarcoma may arise in any part of the body, but is more common in soft tissue than in bone. Common angiosarcoma locations include the head and neck area, kidney, liver, lung, and and the most common site of radiation-induced angiosarcoma development is the breast. The PTPRB/PLCG1 genes are associated with the development of angiosarcoma; mutation of these genes result in aberrant angiogenesis. The imaging modality of choice for diagnosing angiosarcoma will depend on the location. For pulmonary angiosarcoma, the imaging modality of choice is enhanced CT scan. For other types angiosarcoma, the imaging modality of choice is MRI. On CT scan, findings suggestive of angiosarcoma may include vascular invasion, nodular enhancement (common), and a hypoattenuating mass. The mainstay adjuvant therapy for angiosarcoma is a doxorubicin-based regimen. The response rate for chemotherapy in patients with angiosarcoma is poor.

Historical Perspective

Angiosarcoma was first discovered by Dr. Juan Rosai, M.D. and colleagues in 1976.[1]

Classification

  • Angiosarcoma may be classified according to the clinical heterogeneity into two main groups, and every group can be subdivided into subtypes according to the anatomical location and etiology:[2][3][4]
Angiosarcoma
Primary Secondary
Cutaneous Post Radiation Angiosarcoma
Breast Lymphedema-associated Angiosarcoma
Soft tissue and Bone Angiosarcoma due to exposure to mutatgens
Visceral

Pathophysiology

File:AngiosarcomaGross.jpg
Source:Wikimedia commons
  • On microscopic histopathological analysis, characteristic findings of angiosarcoma may include irregular anastomosing vascular spaces lined by endothelial cells.[10]
  • Endothelial cells have hyperchromatic or vesicular nuclei with fast mitotic activity and necrotic spots.[11]
  • The tumor cells in solid area are characterized by a spindled appearance and contain Weibel-Palade bodies.[12]
  • Immunohistochemical staining of spindle cells highlights CD31, CD34 and von-Willebrand factor related antigens which define the vascular origin of tumor cells.[13]

Causes

The most common cause of angiosarcoma appears to be therapeutic radiation, which was a well-recognized cause of hepatic angiosarcoma in the era when the thorium containing contrast agent Thorotrast was employed. Presently, the breast is the most common anatomic site affected by radiation-induced angiosarcoma. Angiosarcomas may arise after exposure to vinyl chloride, although they remain rare tumors even in an exposed population. Angiosarcomas are also observed after lymphedema from any cause, be it surgical, filarial, or congenital, and defined as Stewart-Treves syndrome. Common causes of angiosarcoma include:[5]

Differentiating Angiosarcoma from Other Diseases

Angiosarcoma must be differentiated from other diseases that cause a highly vascular mass or non-healing cutaneous ulcerations such as:

Differentials for Cutaneous Angiosarcoma

Cutaneous angiosarcoma must be differentiated from other diseases with non-healing cutaneous ulcerations such as:[14][15][16]

Differentials for Non-cutaneous Angiosarcoma

Angiosarcoma must be differentiated from other diseases that cause a highly vascular mass such as:[17]

Epidemiology and Demographics

  • In general 2% of soft tissue sarcomas are angiosarcomas, and the incidence of soft tissue sarcoma is about 6 per 100,000 person; on the other words,the incidence of angiosarcomas can be calculated approximately 1.2 per 1,000.000 person.[5][18]
  • Angiosarcoma is more commonly observed among patients aged between 40 to 75 years old.The peak age of incidence appears is the 7th decade,[19]
  • Males are more commonly affected with angiosarcoma than females.[19]
  • The male to female ratio is 2:1.[19]
  • There is no racial predilection for angiosarcoma. however, African-Americans in the U.S are rarely affected.[20]

Risk Factors

Common risk factors in the development of angiosarcoma include:[5]

Natural History, Complications and Prognosis

  • The majority of patients with angiosarcoma remain asymptomatic for years.[5]
  • Early clinical features may include nonspecific symptoms, such as pain, fatigue, malaise, and nausea.
  • If left untreated, the majority of patients with angiosarcoma may rapidly progress to develop metastases.[19]

Common complications of angiosarcoma include:[5]

Diagnosis

Diagnostic Study of Choice

  • There is no single diagnostic study of choice for the diagnosis of angiosarcomas. The imaging modality of choice for angiosarcoma or use of punch biopsy of skin will depend on the anatomic location of lesions.
    • Magnetic resonance imaging (MRI) is the imaging modality of choice for evaluating of suspicious lesions of the extremities, retroperitoneum, or abdominal wall.[21]
    • CT scan is useful in for evaluating of lung, pleural, and mediastinal involvement.
    • An x-ray may be helpful in the diagnosis of bone angiosarcoma. Findings on an x-ray suggestive of diagnostic include solitary lytic lesion, with irregular borders or a mixed lytic-sclerotic pattern.[22]
    • Punch biopsy of cutaneous lsions accompanied with immunohistochemical staining provide accurate findings for diagnosis of cutaneous angiosarcoma. Findings associated with angiosarcoma include irregular anastomosing vascular spaces lined by endothelial cells, and immunohistochemical staining of tumor cells highlights CD31, CD34 and von-Willebrand factor related antigens which define the vascular origin of tumor cells.[10][13]

Staging

According to the American Joint Committee on Cancer (AJCC)/Union for International Cancer Control (UICC) and by Enneking classification, soft tissue sarcomas are classified to different stages based on the primary tumor characteristics, histological grading and the local or distant tumor involvement. Table below provides summarized information regarding staging of angiosarcoma:[23][24]

Stage Grade Site Metastasis
Ia Low grade (G1) Intracompartmental (T1) No metastasis (M0)
Ib Low grade (G1) Extracompartmental (T2) No metastasis (M0)
IIa High grade (G2) Intracompartmental (T1) No metastasis (M0)
IIb High grade (G2) Extracompartmental (T2) No metastasis (M0)
IIIa Low or High grade (G1-G2) Intracompartmental (T1) Metastasis (M1)
IIIb Low or High grade (G1-G2) Extracompartmental (T2) Metastasis (M1)

Symptoms

  • Angiosarcomas occur at different anatomic sites and grow insidiously, then they can present with various misleading symptoms.[25] The most common clinical manifestation is a gradually enlarging, painless mass. [26]Some patients complain of pain or symptoms due to compression of adjacent neurovascular structures that causes pain or edema in an extremity.
  • Primary cutaneous, head and neck and breast angiosarcoma may present with skin thickening, erythema, or skin discoloration.[27][28]
  • Secondary angiosarcomas include radiation-Induced and lymphedema-associated Angiosarcoma have a distinct feature, presenting as single or several ecchymotic maculopapular cutaneous lesions in the radiation field or in areas exposed to chronic lymphedema.[29]

Physical Examination

Patients with angiosarcoma may appear cachectic or normal. In cutaneous angiosarcoma, physical examination findings may include:

Laboratory Findings

  • There are no specific laboratory findings associated with angiosarcoma.

Electrocardiogram

  • There are no ECG findings associated with angiosarcoma.

Echocardiography or Ultrasound

  • On ultrasound imaging, angiosarcoma may have variable features according to the location of the tumor. It may appear as an echogenic, nodular, or lobulated mass.[30]

X-ray

  • There are no x-ray findings associated with angiosarcoma.

Imaging Findings

  • The imaging modality of choice for angiosarcoma will depend on the location.
  • For pulmonary angiosarcoma, the imaging modality of choice is enhanced CT scan.[19] For other types angiosarcoma, the imaging modality of choice is MRI.

CT Scan

On CT, findings of angiosarcoma may include:[19]

  • Vascular invasion
  • Nodular enhancement (common)
  • Hypoattenuating mass
  • Multicentric lesions

MRI

On MRI, findings of angiosarcoma may include:[31]

  • T1/T2: heterogeneous areas of hyperintensity suggestive of a mixed tumour and hemorrhage
  • T1 C+ (Gd): heterogeneous enhancement

Other Imaging Findings

  • There are no other imaging findings associated with angiosarcoma.

Other Diagnostic Studies

  • There are no other diagnostic studies associated with angiosarcoma.

Treatment

Medical Therapy

  • The role of adjuvant chemotherapy, is unclear. Adjuvant chemotherapy and/or radiotheray provide less mutilating surgery, and for patients with unresectable tumors or those who refuse surgery is an option.[32][33]
  • Since angiosarcomas are histologically anthracycline-sensitive, then initial systemic chemotherapy for unresectable and/or metastatic angiosarcomas include doxorubicin-based therapy with or without ifosfamide.[34]
  • However, taxane-based regimen may be preffered for initial therapy.Paclitaxel is effective for advanced angiosarcoma.[35]
  • Gemcitabine-based regimen is preferable to doxorubicin with or without ifosfamide for patients with significant clinical haert failure, due to heart-toxicity of doxorubicin.[36]
  • In addition, some vascular biologic molecules, with antiangiogenic characteristics including bevacizumab, sunitinib, and sorafenib, and with or without cytotoxic chemotherapy have shown dramatic responses in a small number of angiosarcoma patients.[37]

Surgery

  • The mainstay of treatment for angiosarcoma is complete surgical resection with wide margins for local and locoregional disease in combination with preoperative or postoperative radiotherapy.[38][39]
  • Surgical resection in combination with radiation therapy is the treatment of choice for small angiosarcomas.[5]
  • Complete surgical resection with wide margins is preferred for local and locoregional angiosarcoma.[5] Owing to the tendency for local infiltration, surgical resection should be associated with preoperative or postoperative radiotherapy.[40]
  • Surgery is not recommended on patients with large sized angiosarcomas. The recurrence rate of angiosarcoma after surgery is 80%.It usually occures after a median of six months locally or distantly and the three-year disease-free and overall survival rates both are low.[41][42]

Primary Prevention

There are no primary preventive measures available for angiosarcoma.

Secondary Prevention

Once diagnosed and successfully treated, patients with angiosarcoma are followed-up every 3, 6, or 12 months depending on the stage at diagnosis. Follow-up testing for angiosarcoma may include:[5]

References

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