Spontaneous new bone formation within the skin. Osteoma cutis may be primary, in which there are no preceding cutaneous lesion, as in Albright's hereditary osteodystrophy, or secondary, following an inflammatory granuloma or scar. They are usually situated deep in the dermis or subcutaneous tissue and may be seen when radiographs of the area are taken. They present a stony-hard texture on palpation.
Cutaneous ossification, Cutis, osteosis, Osteodermia, Osteoma cutis, Osteosis cutis, Osteosis, cutis