As a result, an abscess—an enclosed pocket of pus and dead tissue—forms. In contrast, cysts aren't infections. The cells of the epidermis, or the outside layer of skin, constantly regenerate.

Medically reviewed by Mary Choy, PharmD A pilonidal cyst, sometimes called pilonidal disease, is a fluid-filled sac that ...

central low T1W and moderate T2W signal (this lesion can appear as a cyst on CT); [9] thick 5 10 mm enhancing capsule discriminates amebic abscess from cyst; may involve diaphragm, pleura ...