For diffuse gastric cancer (DGC), genetic testing for CDH1 should be considered in which of the following situations? (poll 10282849)

For diffuse gastric cancer (DGC), genetic testing for CDH1 should be considered in which of the following situations?

DGC is diagnosed before age 50 years without a family history.

Personal or family history of DGC and invasive ductal breast cancer, one diagosed before age 50.

2 cases of gastric cancers in the family, one confirmed before age 60.

3 confirmed cases of DGC in 1st or 2nd degree relatives independent of age.

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