Nipple shadows in X-ray films.
D005260:Female; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D008327:Mammography; D008875:Middle Aged; D009558:Nipples / Q000000981:diagnostic imaging*; D013902:Radiography, Thoracic / Q000379:methods