Our aim was to find out the factors influencing the complete excision of nonpalpable carcinoma. During a 2-year period, 215 patients (median age 55 years) underwent biopsy after wire localization of 222 nonpalpable breast lesions. Mammographic, surgical and pathological factors were correlated with the outcome of surgery using contingence tables in SPSS statistical software. A total of 96 carcinomas were diagnosed: 38 in situ and 58 invasive carcinomas. Surgical margins were clear in 43, close in 20 and involved in 33 cases. Factors correlated with clear surgical margins are mammographically spicular lesion, cytologically proven carcinoma, excision of more than 50 g of tissue, carcinoma smaller than 10 mm, invasive carcinoma without in situ component, and unicentric ductal carcinoma in situ ( p<0.05). Complete excision of multifocal in situ carcinoma or invasive carcinoma with extensive in situ component, which are diagnosed on mammogram as suspicious microcalcifications, remains a puzzling surgical task.
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