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  • Title: Breast hamartoma with invasive ductal carcinoma. Report of two cases and review of the literature.
    Author: Anani PA, Hessler C.
    Journal: Pathol Res Pract; 1996 Dec; 192(12):1187-94. PubMed ID: 9182287.
    Abstract:
    Two cases of well-defined masses also containing clinical and radiographical abnormalities suggestive of malignancy, subsequently found to be invasive ductal carcinomas in breast hamartomas are described. The patients were 53 and 78 years old. Both presented with a generally soft palpable breast lump, containing a firm area which in one case invaded and ulcerated the skin. Mammography demonstrated two typical hamartomas: one containing a spiculated opacity, the other irregular opacities with suspicious calcifications, suggesting the presence of carcinomas in these benign lesions. The cut surface of these well-circumscribed masses measured 5 cm and 7 cm. The microscopic appearance was characteristic of breast hamartoma (sharp circumscribed "pseudocapsule" surrounding breast fibrocystic changes with variable amounts of adipose tissue) with the firm area in each case corresponding to invasive ductal carcinoma. In one case the invasive ductal carcinoma was confined to the hamartoma, whereas in the other malignant tumor, cells extended beyond the surrounding breast tissue and infiltrated the skin. These findings raise the question of secondary involvement of a hamartoma by invasive carcinoma. Breast hamartomas are probably underrecognized lesions. In our view, these findings do not justify a more aggressive approach towards the management of breast hamartomas.
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