Final answer:
A lesion that is confined to a specific area of the body and contains pus is known as an abscess, which is caused by an infection and can manifest on the skin as a boil or carbuncle.
Step-by-step explanation:
A characteristic of a lesion that is confined to a particular part of the body and contains pus is that it is an abscess. An abscess is a localized collection of pus in tissues, organs, or confined spaces in the body, typically caused by an infection. When such a lesion is found on the skin, it can be referred to as a boil or a carbuncle, depending on the number of furuncles involved and the depth of the infection. For instance, skin infections like acne can manifest as inflamed hair follicles (folliculitis), producing pus-filled lesions like a furuncle. On the other hand, impetigo is characterized by vesicles, pustules, or bullae that can rupture to form encrusted sores.