Denotes a concentration of mature compact (cortical) bone within the cancellous bone (spongiosa) and can be referred to as condensing osteitis. This benign lesion may be located anywhere in the skeleton but has a predilection for the long bones and pelvis. It is probably congenital in nature and suggests failure of resorption during endochondral ossification.
A harmless growth inside a bone, usually in the skull or in a long bone.