**6. Metastasis**

About 2.6% of all gastric tumours are metastases to the stomach.

Malignant melanoma is the most frequent reason for metastases followed by some carcinoma: like lobular breast carcinoma (compare **Figure 4**) or colon, prostate, lung, pancreas, liver (mainly hepatocellular carcinoma) and very rare sarcoma (epithelioid angiosarcoma) [40–43].

The correct diagnosis can be quite challengingly—the following immunohistochemistry panel may help to find the correct answer:

**Figure 4.** Metastasis lobular breast carcinoma: (A) metastasis lobular breast carcinoma (HE), (B) estrogen-receptor and (C) GATA3.

