Rosen's Breast Pathology, 4e

FIG. 11.8.  DCIS, dimorphic. A: Papillary structure with two cell types. B: Cuboidal cells with basally oriented nuclei on the surface and intervening bands of polygonal cells. The two cell types have similar nuclear cytology. C: Invasive mucinous carcinoma that arose from this dimorphic DCIS.

FIG. 11.9.  DCIS, discordant structure and nuclear grade. A: Cribriform DCIS with low nuclear grade and necrosis. B: Micropapillary DCIS with high nuclear grade. C: Flat micropapillary (“clinging”) carcinoma with apocrine traits and high nuclear grade.

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