- Vascular Tumors display a range of seriousness from non-neoplastic lesions to benign and malignant neoplasms. With a few exceptions the cell of origin is the endothelial cell and nearly all neoplasms are derived from small vessels. In general, non-neoplastic lesions and benign neoplasms tend to form recognizable, fluid or blood-filled vessels whereas malignant neoplasms tend to form solid masses of highly deranged cells.
- A few terms are worth clarifying prior to a discussion of individual diseases
- Ectasias are not true neoplasms but just localized dilations of pre-existing blood vessels
- Telangiactasias are a subtype of ectasias which produce localized, red lesions usually in the skin and mucous membranes
- Reactive Vascular Proliferations are non-neoplastic proliferations of blood vessels in response to infection by certain microbes.
- Vascular Ectasias
- Reactive Proliferations
- Benign Neoplasms
- Malignant Neoplasms