The specimen shows the cut surface of a piece of breast in which there is a central ovoid area
showing cystic spaces in some cases partly and in other completely filled with a coarsely papillary
tumour. Towards one end of the specimen there is an 0.5 cm area of similar appearance. The
histology of the lesion is that of a papillary carcinoma which has arisen within the duct system, in
the sections examined infiltration by tumour into the surrounding tissue is apparent.