Rare common bile duct metastasis of breast cancer: A case report and literature review

Figure 6 Histopathology of biopsies of the common bile duct and the skin of left neck and chest. A: Cancer cells were found to have infiltrated the glandular duct of the common bile duct (CBD); B and C: Low-power magnifications (B: 2´, C: 40´) demonstrating cancer embolus in the vasculature of the skin; D: Positive immunohistochemistry (IHC) staining for CD34 in the cancer embolus areas; E and F: Strong positive IHC staining for cytokeratin (CK) 7 and trans-acting T-cell-specific transcription factor (GATA-3) in the CBD; G: Strong positive IHC staining for CK7 in the skin of left neck and chest; H: Strong positive IHC staining for GATA3 in the skin of left neck and chest.