What is a common characteristic of a benign hemangioma?

A benign hemangioma is commonly characterized by consisting of blood vessels. These growths are composed of a dense cluster of blood vessels and are typically found in the skin or internal organs. They are vascular tumors that appear as red or purple marks and can be especially prevalent in infants and children. The composition of a hemangioma is what distinguishes it from other types of tumors, which may include different types of tissues or cells.

Choosing the option about blood vessels indicates an understanding of the nature of hemangiomas as vascular lesions. While other options may mention associated symptoms or characteristics, they do not accurately reflect the defining feature of a hemangioma. For example, hemangiomas are not caused by viral infections, do not typically cause yellowing of the skin, and do not usually appear as firm masses; instead, they may be soft and compressible depending on their location and size. Thus, recognizing that a benign hemangioma is characterized by its content—blood vessels—provides a clear and accurate understanding of what this type of tumor is.