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Colon tumor

Mesenchymal tumors

Hemangioma of colon


Reviewers: Charanjeet Singh, M.D. (see Reviewers page)
Revised: 14 April 2012, last major update April 2012
Copyright: (c) 2003-2012, PathologyOutlines.com, Inc.

General
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● Usually associated with systemic syndromes
● Causes melena, anemia, rarely intussusception or obstruction
● Capillary and cavernous subtypes

Capillary hemangioma
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● Small, closely packed capillaries, rarely multiple (Dtsch Med Wochenschr 2004;129:1970)

Cavernous hemangioma
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● Localized or diffuse
● Blood filled sinus-like spaces with scant connective tissue, variable smooth muscle
● Often in rectum and associated with mass or bleeding
● May be infiltrative (Rev Gastroenterol Mex 2004;69:94, Rev Esp Enferm Dig 2004;96:346)

Arteriovenous malformation / hemangioma
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● Composed of abnormal arteries and veins
● See Vascular ectasia in Colon-nontumor chapter
● Hemangiomas are associated with Klippel-Trenaunay-Weber syndrome (Ann Univ Mariae Curie Sklodowska Med 2004;59:356, somatic and bony hypertrophy, port wine stain, bladder hemangiomas) and blue rubber bleb nevus syndrome (Eur J Pediatr Surg 2003;13:137, skin and visceral hemangiomas)
● Telangiectasias are associated with hereditary hemorrhagic telangiectasia (telangiectasias of skin, mucosa and internal organs), Turnerís syndrome (XO, short stature, webbed neck, streak ovaries and shield chest) and progressive systemic sclerosis
● Cecum hemangiomas are associated with cardiac or vascular disease (Gastroenterology 1976;71:1079)

Micro images
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Cavernous hemangioma of colonic serosa


Incidental submucosal hemangioma in sigmoid colectomy

End of Colon tumor > Mesenchymal tumors > Hemangioma of colon


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