Which of the following is an example of ecchymosis?

Ecchymosis refers to the discoloration of the skin resulting from bleeding underneath, typically caused by trauma, leading to a bruise. It is characterized by a blue, purple, or black mark that changes color as it heals. This phenomenon is distinct from other skin manifestations such as hematomas, which are larger localized collections of blood outside blood vessels, usually raised and firm. Keloids are raised scars that result from abnormal healing of the skin after an injury, while patches are non-raised areas of discoloration typically linked to dermatological conditions.

Understanding ecchymosis as a type of bruise helps appreciate its role in injury assessment and the body’s responses. The color changes of a bruise throughout the healing process also provide insights into the underlying physiological mechanisms involved in tissue repair.