[Borderline lesions of the breast: clinical and radiological study of 20 cases].

We describe the clinical and mammographic signs observed in 20 patients with atypical hyperplasia of the breast. The clinical signs include abnormalities noted at palpation (tumefaction, masses, clusters of nodules) and nipple discharge. The mammographic signs include rounded, clearly delineated opacities with benign appearances, or spiculated masses possibly associated with microcalcifications, stellate opacities, and isolated foci of microcalcifications. Galactography may visualize milk ducts dilatation. Both the clinical and mammographic signs are non-specific and even equivocal and do not allow pre-operative diagnosis of non-specific lesions.