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Pre-operative evaluation of palpable breast tumours.

The diagnostic accuracy of clinical examination, mammography and fine-needle aspiration cytology in identifying malignancy was retrospectively assessed in 207 women with palpable breast masses undergoing breast biopsy for histological examination. Clinical examination was more sensitive (96%) than mammography (81%) or cytology (69%). Cytological examination was totally specific for malignancy. The combined evaluation of clinical examination, mammography and cytological examination revealed a 100% diagnostic accuracy for concordant triplet results. Where discordant triplet results were recorded, 75% of tumours were malignant. Biopsy and frozen section are thus recommended if the 'triplet' provides conflicting results. Preliminary biopsy and frozen section may be unnecessary when the diagnostic triplet unequivocally demonstrates malignancy, or when cytological examination reliably reveals the presence of malignancy. Where the components of the triplet all point to benignity, the patient may be confidently followed up without the necessity of biopsy. The adoption of these guidelines may safely reduce the number of open breast biopsies by about 50-60%.