Some, like the classic strawberry hemangioma, may not appear until your baby is two or three weeks old. (verywellfamily.com)
Rothschild hasn't been able to identify the dinosaur species, but the growths resemble benign tumors called hemangiomas found today in the bones of humans and other animals. (discovermagazine.com)
Infantile hemangiomas may not be present at birth or may only present themselves in the form of a reddish patch which later increases into a raised or elevated one. (newkidscenter.com)