Angiolipomas (also sometimes known as haemangiolipomas, vascular lipomas, and fibromyolipomas) are rare soft tissue tumours composed of mature adipocytes and vessels. They can occur essentially anywhere, and can be subclassified into infiltrating and non-infiltrating varieties 1.
The most common locations are the extremities and the soft tissues of the neck and trunk 2.
Please refer to the epidural (spinal) angiolipoma article for a specific discussion. The remainder of this article describe the general features of peripheral angiolipomas.
As expected these masses contain a mixture of soft tissue and fatty components, with prominent vascular supply.
Angiolipomas demonstrate heterogeneous signal due to mixture of fatty and non-fatty components. Non-fatty components enhance vividly following administration of contrast 2.
Catheter angiography demonstrates prominent coarse neovascularity. During the capillary phase, contrast staining is typically seen 1.
Treatment and prognosis
Treatment is predominantly surgical, although infiltrating tumours are difficult to completely excise 1.
- 1. Finberg HJ, Levin DC. Angiolipoma: a rare benign soft tissue tumor with a malignant arteriographic appearance. AJR Am J Roentgenol. 1977;128 (4): 697-8. doi:10.2214/ajr.128.4.697 - Pubmed citation
- 2. Leu NH, Chen CY, Shy CG et-al. MR imaging of an infiltrating spinal epidural angiolipoma. AJNR Am J Neuroradiol. 2003;24 (5): 1008-11. AJNR Am J Neuroradiol (full text) - Pubmed citation