Fig. 5
From: A difficult-to-diagnose fibromatosis-like metaplastic carcinoma of the breast: a case report
Immunohistological findings of the lumpectomy specimen. a Low-grade and slightly atypical spindle cells and partly atypical spindle cell carcinoma were observed (H&E × 100). b Partly atypical squamous cell carcinoma was observed (H&E × 100). c α-SMA was positive in spindle cells. d CK5/6 were positive in squamous cells. H&E hematoxylin and eosin, SMA smooth muscle actin, CK cytokeratin