Fig. 1: Invasive micropapillary carcinoma of the breast. | Modern Pathology

Fig. 1: Invasive micropapillary carcinoma of the breast.

From: Intense basolateral membrane staining indicates HER2 positivity in invasive micropapillary breast carcinoma

Fig. 1

a The tumor is composed of pseudopapillary and tubuloalveolar structures floating in empty, clear spaces lined by delicate strands of stroma (H&E, ×100). b High-power magnification shows hyperchromatic, high-grade nuclei in the tufts of neoplastic cells. A mitotic figure is present (upper right) (H&E, ×400). c Immunohistochemical staining for epithelial membrane antigen shows cell membrane positivity only toward the stromal pole (immunoperoxidase, ×400).

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