Most common single type of vascular tumor.
Most common in the subcutaneous tissues, skin, mucous membranes of the lips and oral cavity.
May occur in the liver, spleen and kidneys.
Strawb2242y type, juvenile hemangioma, of the skin of newborns very common with 1 in 200 births.
Strawb2242y type may be multiple.
Strawb2242y type grows rapidly in the first few months, then fades at 1-3 years and regresses by age 7 in 75-90% of cases.
Size varies from a few millimeters to several centimeters in diameter.
Lesions red to blue and level to the skin surface although they may be slightly elevated.
Have intact epithelial covering.
Aggregates of packed thin capillaries, usually with blood in the vessels and lined by endothelium.
The lumen may be thrombosed.