||A capillary hemangioma, or strawberry birthmark, is a bright red and soft lobulated benign tumor that usually appears between the third and fifth weeks of life. Capillary hemangiomas may increase in size up to 1 year of age and then begin to regress. Complete spontaneous resolution occurs in approximately 70% of capillary hemangiomas by the age of 7 years.
In the early period of growth, capillary hemangiomas may show considerable proliferation of their endothelial cells. At this time, the endothelial cells are large and aggregated in solid strands or masses, with only a few small patent capillary lumina present.
In maturing capillary hemangiomas, the capillary lumina are wider and the lining endothelial cells flatter. As involution occurs, deposits of hyalin can be observed in the wall of the capillary, gradually producing narrowing and complete occlusion of the capillary lumina. This gradual occlusion is followed by eventual involution of the capillaries and replacement by edematous collagen.
Since these lesions tend to regress completely, no treatment is required for most capillary hemangiomas.
A discrete capillary hemangioma has developed behind the pinna of this 6-month-old infant. Notice the bright red cherry-like color.