Hemangioma
A birth irregularity where a localized tissue mass grows rich in small blood vessels.
Capillary hemangiomas are composed nearly entirely of tiny capillary vessels.
Cavernous hemangiomas are composed of blood- filled 'lakes' and channels.
An hemangioma may be visible through the skin as a birthmark, known colloquially as a 'strawberry mark.' Most hemangiomas that occur at birth disappear after a few months or years.