@ja5747, in my search, I didn't find any instance of stomach metastasis either, so I'm glad you started this specific discussion. I also agree about the limitations of the site search. We are currently in the discovery phase of improving the search function. I will add your feedback to the development team.
I found this research article (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5604170/) to help me understand a bit more about lobular breast cancer and stomach metastasis. Seems like it is quite rare, but is most often associated with invasive lobular breast cancer and often mimicks early gastric cancer (EGC). How did you discover the stomach lesions? Did you have to go through additional testing to confirm if it indeed was metastasis vs a second cancer of the stomach?