title: [Safeguarding of diagnosis (C-key), a necessary supplement to the TNM classification of breast cancer].
mesh_terms: D001317:Austria; D001365:Axilla; D001943:Breast Neoplasms / Q000145:classification* / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D003951:Diagnostic Errors; D003954:Diagnostic Services; D005260:Female; D005500:Follow-Up Studies; D005860:Germany, West; D006801:Humans; D007391:International Cooperation; D008207:Lymphatic Metastasis; D009362:Neoplasm Metastasis; D011446:Prospective Studies; D012189:Retrospective Studies; D013557:Switzerland
vernacular_title: Die Diagnosesicherung (C-Schlüssel), eine notwendige Ergänzung der TNM-Klassifizierung beim Brustkrebs.