Final answer:
A stage 2 pressure ulcer is characterized by a shallow crater involving the epidermis.
Step-by-step explanation:
A stage 2 pressure ulcer is characterized by a shallow crater involving the epidermis. This means that there is partial thickness loss of the skin, and the wound is superficial, only extending into the epidermal layer of the skin. It may appear as an abrasion, blister, or shallow ulcer.