Rectal angiolipoma: A case report and review of literature

Table 2 Histopathological findings of cases in literature

Literature	Histopathological findings under light microscope
Jensen EH et al[9]	A submucosal polypoid mass, consisting of benign lipomatous tissue mixed with vascular channels, consistent with benign angiolipoma
DeRidder et al[10]	Submucosa contained a well demarcated nodule composed of flat, extending from the under surface of the muscularis mucosa to the deep margin of biopsy. There were separate, well developed small arteries and veins
McGregor D et al[11]	A circumbscribed, lobular, pinkish-tan soft ovoid mass showing proliferation of mature adipose tissue and vascular tissue surrounded by a thin to focally thick fibrous capsule in the submucosa, no definite fibrin trombi
Hunt J et al[12]	A solitary Peutz-Jeghers-type polyp showing typical glandular epithelium, overriding a 5 cm gastric angiolipoma
Mohl W et al[14]	2 submucosal duodenal angiolipomas, one with large central vessel and one colonic angiolipoma
Yung IS et al[15]	A submucosal lesion composed of mature adipose tissue and small vessels with fibrin thrombi within the vascular channels
Manner M et al[17]	An angiolipoma with 20% vascular component and mucosal ulceration
Kwak HS et al[18]	Mature, higly vascular adipose tissue consistent with angiolipoma
Kato K et al[20]	A circumbscribed proliferation of mature adipose and vascular tissue surrounded by a thin to focally thick fibrous capsule in the submucosa, with fibrin thrombi in small capillaries
Saroglia G et al[21]	Mature adipose and vascular tissue
Vandamme J et al[22]	Angiolipoma with multiple small vessels and adipose tissue
Okuyama T et al[23]	Encapsulated by a thin layer of connective tissue, arising in the submucosa and composed of mature adipose tissue and proliferating capillaries, many fibrin thrombi in capillary lumen
Chen YY et al[24]	Encapsulated by a thin layer of connective tissue arising from the submucosa, histologically was comprised of mature adipose tissue and proliferative blood vessels
Kacar S et al	Proliferated submucosal blood vessels and mature adipose tissue. There was no fibrin thrombus