Radiology, Vol 192, 153-156, Copyright © 1994 by Radiological Society of North America

ARTICLES

Stability of malignant breast microcalcifications

AS Lev-Toaff, SA Feig, VL Saitas, GC Finkel and GF Schwartz
Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, PA 19107.

PURPOSE: To determine the frequency of stability in malignant microcalcifications and its relationship to specific histologic diagnoses. MATERIALS AND METHODS: During a 34-month period, microcalcifications were proved malignant in 182 patients referred for needle-guided biopsy. In 105 patients, the mammograms were compared with one or more than one previous mammogram. These patients were classified on the basis of interval change in two groups: those with stable and those with increasing or new microcalcifications. The histologic diagnoses were reviewed. RESULTS: Microcalcifications were stable for 8-63 months (mean, 25.4 months) in 26 patients (24.8%), only three (12%) of whom had invasive ductal carcinoma, which was found in 29 (37%) of the 79 patients with increasing or new microcalcifications. CONCLUSION: The odds for presence of invasive ductal carcinoma are statistically significantly lower (P < .025) among patients with stable microcalcifications than among those with increasing or new microcalcifications. Stability of indeterminate or suspicious microcalcifications is unreliable for exclusion of a diagnosis of malignancy.

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