To assess whether the presence and amount of intraductal component (IC) in diagnostic needle core biopsies (NCB) is predictive of an extensive IC (EIC), the authors evaluated 50 invasive @entity513 diagnosed with NCB, and then excised via lumpectomy, with regard to the extent of IC in both the NCB and subsequent lumpectomy specimen. These parameters were compared with each other and with the lumpectomy margin status. Extent of IC in the NCB was evaluated by dividing the number of ducts that contained IC by the total number of tissue cores. A ratio of more than 0.5 was considered EIC (EICc). IC extent in the lumpectomy was established by estimating the percentage of the @entity5 corresponding to IC and was considered extensive (EIC(L)) if more than 25% and if there was presence of IC away from the invasive @entity5 . The mean size of resected @entity5 was 1.6 +/- 0.7 cm. In 29 cases (58%) there was no IC in the NCB (NegICc), 11 cases (22%) exhibited nonextensive IC (NEICc), and 10 cases (20%) demonstrated EICc. A total of 7%, 36%, and 70% of the NegICc, NEICc, and EICc cases respectively had EIC(L)(p < 0.0001). The presence of EIC(L) correlated significantly with close or positive margin status for in situ disease (EIC(L) positive, 12 of 13 [92%] vs EIC(L) negative, 11 of 37 [30%]; p = 0.004). None of the NegICc, 27% of NEICc, and 40% of EICc had a positive margin for in situ @entity5 in the lumpectomy specimen (p = 0.004), and 24%, 18%, and 50% had positive margins for invasive @entity5 (p = not significant). The authors conclude that EICc predicts EIC(L) and constitutes a risk factor for positive lumpectomy margin status-particularly for in situ @entity5 . EICc may thus be of clinical value in identifying a subset of @entity1 that requires a wider local excision.

Clinicopathologic significance of XXXX in situ in breast core needle biopsies with invasive cancer.

@entity513 :: ('MESH:D044584', 'Disease') :: ['ductal carcinomas'] @entity1 :: ('9606', 'Species') :: ['patients'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'tumors', 'neoplasm']
@entity513 :: (MESH:D044584,Disease) :: ['ductal carcinoma']
