Fig. 4

Pathology of the surgical specimen. (A–D) The pyloric mass was GATA3-negative and MUC5AC-positive, consistent with gastric cancer. (E–H) The numerous nodules in the corpus was GATA3-positive and MUC5AC-negative, consistent with metastatic breast cancer. (I–L) A lymph node was partially GATA3-positive/MUC5AC-negative and partially GATA3-negative/MUC5AC-positive, suggesting a collision tumor of metastases from both gastric cancer and breast cancer