Angiolipoma is a lipoma with prominent vascularity. The vascular tissue is more abundant at the periphery of the tumour and contains fibrin thrombi.
Mammary angiolipomas, unlike angiolipomas at other sites, are notoriously painless
Tavassoli FA, Devilee P (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of the Breast and Female Genital Organs.
IARC Press: Lyon 2003
Pathology of the Breast
Appleton and Lange: Stanford 1992
Yu GH, Fishman SJ, Brooks JS (1993)
Cellular angiolipoma of the breast.
Mod Pathol 6: 497-9