title: Primary osteoma cutis.
abstract: Primary osteoma cutis in a 24-year-old white woman presented as a small hard tumor beneath the skin of the left breast. Histologic examination of the lesion showed typical osteoma cutis. This was likely to be a case of primary osteoma cutis since the history and results of physical examination and laboratory tests failed to reveal other abnormalities.
mesh_terms: D000328:Adult; D001940:Breast; D005260:Female; D006801:Humans; D010016:Osteoma / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*